Tag: phenomenon (page 2 of 5)

17 Surprising Reasons You’re Stressed Out





Excerpt from huffingtonpost.com
By Amanda MacMillan


You're probably all too aware of the major sources of stress in your life -- money, your terrible commute, the construction workers who start jackhammering at 5 a.m. But stress and anxiety don't have to just come from obvious or even negative sources. "There are plenty of chronic strains and low-grade challenges that don't necessarily overwhelm you in the moment, but almost take more of a toll in the long run," says Scott Schieman, Ph.D., professor of sociology at the University of Toronto. These are some of unexpected reasons why you might feel anxious or agitated. By recognizing them for what they are, says Schieman, you can better prepare to cope.

1. Your Significant Other
Even if you have a blissfully happy relationship with your live-in partner or spouse, you're both bound to do things that get on each other's nerves. "Early in the relationship, it's usually about space and habits -- like whether you squeeze the toothpaste from the middle or the bottom of the tube," says Ken Yeager, Ph.D., associate professor of psychiatry at the Ohio State University Wexner Medical Center. "Later on, you might clash over parenting style or financial issues, and finding a unified front to face these issues together." So what's the key to surviving and thriving in your life together? Finding balance, says Yeager: spending the right amount of time together (not too much and not too little), making compromises, keeping communication open and honest, and remembering to acknowledge what you love about each other on a daily basis.


2. Everyday Annoyances
We're told not to sweat the small stuff, but sometimes it's the little things that have the biggest impact on our mood: the never-ending phone calls with your insurance company, the rude cashier at the grocery store, the 20 minutes you lose looking for a parking space. "We let these things bother us because they trigger unconscious fears," says Yeager -- fears of being seen as irresponsible, of being bullied or embarrassed, or of being late all the time, for example. "Sometimes you need to take a step back and realize that you're doing the best you can given the circumstances." 


3. Other People's Stress
Stress is contagious, according to a 2014 German study: In a series of experiments, most participants who simply observed others completing a stressful task experienced an increase themselves in production of the stress hormone cortisol -- a phenomenon known as empathic stress. You can also experience stress when someone you know is affected by a traumatic event, like a car crash or a chronic illness. "You start to worry, 'Oh my gosh, could that happen to me?'," says Yeager. "We tend not to think about these things until they hit close to home."


4. Social Media social media
It may seem like Facebook is the only way you keep up with the friends you don't see regularly -- which, during particularly busy times, can be just about all of them. The social network also has a downside, according to a 2015 study from the Pew Research Center: It can make you aware of stressful situations in your friends' lives, which in turn can add more stress to your life. The Pew report didn't find that social media users, overall, had higher levels of stress, but previous studies have suggested that frequent social-media use can be associated with negative body image and prolonged breakup pain.


5. Distraction
A distraction can be a good thing then when it takes your mind off of a stressful situation or difficult decision, like when you take a break from work to meet a friend for lunch. But it works the other way, as well: When you're so busy thinking about something else that you can't enjoy what's going on around you, that kind of distraction can be a recipe for stress. Practicing mindfulness gives you brain the refresh it needs, says Richard Lenox, director of the Student Counseling Center at Texas Tech University. Paying full attention to your surroundings when you're walking and driving can help, he adds. "Stress and anxiety tend to melt away when our mind is focused on the present." 


6. Your Childhood
Traumatic events that happened when you were a kid can continue to affect your stress levels and overall health into adulthood. A 2014 University of Wisconsin-Madison study found that these childhood experiences may actually change parts of the brain responsible for processing stress and emotion. The way you were raised can also have a lasting impact on your everyday angst, suggests a 2014 Johns Hopkins University study. Researchers found that children of parents with social anxiety disorders are more likely to develop "trickle-down anxiety" -- not simply because of their genes, but because of their parents' behaviors toward them such as a lack of warmth and emotion, or high levels of criticism and doubt.


7. Tea And Chocolate
You probably know to take it easy on the coffee when you're already feeling on edge. "Caffeine is always going to make stress worse," says Yeager. But you may not think as much about drinking several cups of tea at once, or chowing down on a bar of dark chocolate -- both of which can contain nearly as much caffeine as a cup of joe. "Chocolate is a huge caffeine source," says Yeager. "I know people who don't drink coffee but they'll eat six little candy bars in a two-hour period because they want the same kind of jolt." Too much caffeine, in any form, can cause problems with sleep, digestion, and irritability. 


8. Your Expectations woman trail running
When things don't go the way you've planned, do you tend to get upset and act defensively, or do you roll with the punches and set off on a new plan? If it's the former, you could be contributing to a mindset of pessimism and victimization that will slowly wear you down, even when things may not be as bad as they seem. "Your level of serenity is inversely proportionate to your expectations," says Yeager. That doesn't mean you shouldn't set ambitious goals for yourself or settle for less than what you want, of course, but being realistic about what's truly possible is important, as well.


9. Your Reaction To Stress
If you tend to deal with stressful situations by working long hours, skipping your workouts, and bingeing on junk food, we've got some bad news: You're only making it worse. "We know that physical activity and healthy foods will help your body better deal with stress, and yet we often avoid them when we need them the most," says Yeager. "People really need to think about this downward spiral we get into and work harder to counteract it."


10. Multitasking
Think you're being super efficient by tackling four tasks at once? Chances are you're not -- and it's only decreasing your productivity while increasing your stress. A 2012 University of Irvine study, for example, found that people who responded to emails all day long while also trying to get their work done experienced more heart-rate variability (an indicator of mental stress) than those who waited to respond to all of their emails at one time. Focusing on one task at a time can ensure that you're doing that job to the best of your abilities and getting the most out of it, so you won't have to worry about or go back and fix it later, says Schieman. And don't worry: You'll have enough time to do it all. In fact, you may discover you have more time than you thought.


11. Your Favorite Sport
Watching a tight game of college hoops can stress you out -- even if your alma mater wins. "The body doesn't distinguish between 'bad' stress from life or work and 'good' stress caused by game-day excitement," says Jody Gilchrist, a nurse practitioner at the University of Alabama at Birmingham’s Heart and Vascular Clinic. Watching sports can even trigger the body's sympathetic nervous system, releasing adrenaline and reducing blood flow to the heart. Those temporary consequences aren't usually anything to be concerned about, but over time, chronic stress can lead to high blood pressure and increased disease risk. And, of course, it doesn't help if you're adding alcohol and binge-eating to a situation that's already stressful on your body. You may not be able to control the outcome of the game, says Gilchrist, but you can limit its effects on your own body. 


12. Digital Devices laptop in bed
Whether you're using it for work or play, technology may play a large role in your mental health, says Yeager. Using computers or e-readers too close to bedtime could lead to sleep problems, he says, and spending too much time virtually socializing can make real-life interactions seem extra stressful. (Plus, texting doesn't trigger the same feel-good hormones as face-to-face talk does.) Then there's the dreaded "work creep," says Schieman, when smartphones allow employees to be tethered to their jobs, even during off-hours. "People say they're only going to check email for an hour while they're on vacation, but the problem with email is that they're filled with responsibilities, new tasks, and dilemmas that are going to be hard to compartmentalize and put out of your head once that hour is up."


13. Your (Good) Health
While it may not be as stressful as having a chronic illness or getting bad news at the doctor's office, even people in the best shape of their lives worry about their bodies, their diets, and their fitness levels. In fact, people who take healthy living to an extreme may experience some rather unhealthy side effects. People who follow low-carb diets, for example, are more likely to report being sad or stressed out, while those on any kind of restrictive meal plan may feel more tired than usual. And it's not unheard of for someone to become obsessed with healthy eating (known as orthorexia) or working out (gymorexia). Like any form of perfectionism, these problems can be stressful at best, and extremely dangerous at worst.


14. Housework
Does folding laundry help you feel calm, or does it make your blood boil? If you're in a living situation where you feel you're responsible for an unfair share of work, even chores you once enjoyed may start to feel like torture. "Dividing up housework and parenting responsibilities can be tricky, especially if both partners work outside the home," says Schieman. "And whether you define that division of labor as equal or unequal can really change your attitude toward it."


15. Uncertainty
Stress can be defined as any perceived or actual threat, says Yeager, so any type of doubt that's looming over you can contribute to your anxiety levels on a daily basis. "When you know something could change at any minute, you always have your guard up and it's hard to just relax and enjoy anything." Financial uncertainty may be the most obvious stressor -- not being sure if you'll keep your job during a round of layoffs, or not knowing how you'll pay your credit card bill. Insecurities in other areas of life, like your relationship or your housing status, can eat away at you too.


16. Your Pet bulldog puppy
No matter how much you love your furry friends, there's no question that they add extra responsibility to your already full plate. Even healthy animals need to be fed, exercised, cleaned up after, and given plenty of attention on a regular basis -- and unhealthy ones can be a whole other story. "Pets can be the most positive source of unconditional love, but at the same time they require an extreme amount of energy," says Yeager. People also tend to underestimate the stress they'll experience when they lose a pet. "I've had people in my office tell me they cried more when their dog died than when their parent died. It's a very emotional connection."


17. Your Education
Having a college degree boosts your odds of landing a well-paying job, so although you're less likely to suffer from money-related anxiety, your education can bring on other types of stress, according to a 2014 study by Schieman and his University of Toronto colleagues. His research found that highly educated people were more likely to be stressed out thanks to job pressures, being overworked, and conflicts between work and family. "Higher levels of authority come with a lot more interpersonal baggage, such as supervising people or deciding whether they get promotions," says Schieman. "With that type of responsibility, you start to take things like incompetency and people not doing their jobs more personally, and it bothers you more."

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Source of puzzling cosmic signals found — in the kitchen






Parkes radio telescope
WHAT’S FOR DINNER? Signals detected by the Parkes radio telescope (pictured) suggest that intelligent life in the universe has a penchant for leftovers.



Excerpt from sciencenews.org

Mysterious radio signals detected by the Parkes telescope appear to come from an advanced civilization in the Milky Way. 

Unfortunately, it’s the one civilization we already know about.
Microwave ovens opened before they’re done cooking have been muddling the hunt for far more distant radio signals, researchers report online April 9 at arXiv.org. Astronomers have had to contend with enigmatic flares dubbed “perytons” ever since discovering equally puzzling fast radio bursts, or FRBs (SN: 8/9/14, p. 22), in 2007. Perytons and FRBs are quite similar, except that astronomers realized that perytons originate on Earth, possibly from some meteorological phenomenon, while FRBs come from other galaxies.

Three perytons in January coincided with independently detected blasts of 2.4 gigahertz radio waves — the same frequency that microwave ovens use to heat food. So researchers at the Parkes telescope in Australia spent weeks heating mugs of water while moving the massive radio dish around the sky, trying to re-create the phenomenon. Finally, researchers tried opening the oven door mid-cooking instead of letting the timer run out. Suddenly, perytons started showing up in the data.

The source of the galactic FRBs remain an intriguing mystery. Astronomers suspect they have something to do with imploding neutron stars or eruptions on magnetars. At this point, however, they might want to consider extraterrestrials nuking frozen pizzas.

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Science of frustrated magnets: Hall Effect experiment reveals clues to their discontent

Excerpt from thewestsidestory.netA scientific study carried out in Princeton has brought about the discovery of unlikely properties in materials called frustrated magnets using the Hall Effect.Hall Effect is the property of magnetic fields having inf...

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Why the U.S. Gave Up on the Moon

Moon nearside



Excerpt from spacenews.com


Recently, several space advocacy groups joined forces to form the Alliance for Space Development. Their published objectives include a mention of obvious near-term goals such as supporting the commercial crew program, transitioning from use of the International Space Station to future private space stations and finding ways to reduce the cost of access to space.  What is notably missing from these objectives and those of many other space agencies, companies and advocacy groups is any mention of building a permanent settlement on the moon. It’s as if the lunar surface has become our crazy uncle that we all acknowledge exists but we’d prefer not to mention (or visit).  What made the next logical step in mankind’s progression beyond the bounds of Earth such a taboo subject?  If, as the Alliance for Space Development suggests, our nation wishes to move toward a path of permanent space settlements, the most logical step is our own planet’s satellite.

Lunar base conception
A 2006 NASA conception of a lunar base. Credit: NASA


A base on the lunar surface is a better place to study space settlement than a space station or Mars for many reasons. Unlike a space station, the base does not have to contend with aerodynamic drag, attitude control issues or contamination and impingement from its own thrusters. Unlike a space station, which exists in a total vacuum and resource void, a lunar base has access to at least some surface resources in the forms of minerals, albeit fewer than might be available on Mars.  Many people naturally want to go directly to Mars as our next step. Even SpaceX has publicly stated this as its ultimate goal, with SpaceX President Gwynne Shotwell noting that “we’re not moon people.” However, Mars makes sense only if we think the technology is ready to safely support humans on another surface for long periods of time. Furthermore, budget restrictions make an ambitious goal like going immediately to Mars an unlikely prospect. Why are we afraid to take the seemingly necessary baby steps of developing the technology for a long-term base on a surface that can be reached in mere days instead of months?  The tendency to want to skip a lunar settlement is not a new phenomenon. Even before the first landing on the moon, U.S. and NASA political leadership was contemplating the future of manned space, and few of the visions involved a lunar base. The early space program was driven by Cold War competition with Moscow, and the kinds of ideas that circulated at the time involved milestones that seemed novel such as reusable spaceplanes, nuclear-powered rockets, space stations and missions to Mars. 

When the United States was on the verge of a series of landings on the moon, building a permanent base just didn’t seem like much of a new giant leap. NASA's ConstellationNASA’s Constellation program, featuring the Orion manned capsule set atop the Ares 1 launch vehicle, was meant to send astronauts back to the moon. Credit: NASA  The idea of a lunar landing mission was not reintroduced seriously until the George W. Bush administration and the introduction of the Constellation program. This program came at a complex time for NASA: The space shuttle was recovering from the Columbia disaster, the space station was in the midst of construction and the United States found itself with large budget deficits. However, despite its budgetary and schedule problems, which are common in any serious aerospace development project from space programs to jumbo-jet development, it provided NASA with a vision and a goal that were reasonable and sensible as next steps toward a long-term future of exploration beyond Earth. 

Constellation was nevertheless canceled, and we have since returned to a most uncommon sense.  The decision to avoid any sort of lunar activity in current space policy may have been biased by the Obama administration’s desire to move as far away as possible from the policies of the previous administration. 

Regardless of the cause, discussion of returning to the moon is no longer on the table.  Without the moon, the only feasible mission that NASA could come up with that is within reach given the current technology and budget is the Asteroid Redirect Mission.  
Even planetary scientists have spoken out against the mission, finding that it will provide little scientific value. It will also provide limited engineering and technology value, if we assume that our long-term goal is to permanently settle space. The experience gained from this sort of flight has little applicability to planetary resource utilization, long-term life support or other technologies needed for settlement.  

If we are to have a program of manned space exploration, we must decide what the long-term goals of such a program should be, and we should align our actions with those goals. When resources such as funding are limited, space agencies and political leaders should not squander these limited resources on missions that make no sense. Instead, the limited funding should be used to continue toward our long-term goals, accepting a slower pace or slight scale-back in mission scope.  Establishing a permanent human settlement in space is a noble goal, one that will eventually redefine humanity. Like explorers before us, it is also not a goal that will be achieved in a short period of time. We would be wise to keep our eyes on that goal and the road needed to get us there. And the next likely stop on that road is a permanent home just above our heads, on the surface of the brightest light in the night sky.  

Paul Brower is an aerospace systems engineer on the operations team for the O3b Networks satellite fleet. He previously worked in mission control at NASA for 10 years.
Recently, several space advocacy groups joined forces to form the Alliance for Space Development. Their published objectives include a mention of obvious near-term goals such as supporting the commercial crew program, transitioning from use of the International Space Station to future private space stations and finding ways to reduce the cost of access to space.
What is notably missing from these objectives and those of many other space agencies, companies and advocacy groups is any mention of building a permanent settlement on the moon. It’s as if the lunar surface has become our crazy uncle that we all acknowledge exists but we’d prefer not to mention (or visit).
What made the next logical step in mankind’s progression beyond the bounds of Earth such a taboo subject?
If, as the Alliance for Space Development suggests, our nation wishes to move toward a path of permanent space settlements, the most logical step is our own planet’s satellite.
Lunar base conception
A 2006 NASA conception of a lunar base. Credit: NASA
A base on the lunar surface is a better place to study space settlement than a space station or Mars for many reasons. Unlike a space station, the base does not have to contend with aerodynamic drag, attitude control issues or contamination and impingement from its own thrusters. Unlike a space station, which exists in a total vacuum and resource void, a lunar base has access to at least some surface resources in the forms of minerals, albeit fewer than might be available on Mars.
Many people naturally want to go directly to Mars as our next step. Even SpaceX has publicly stated this as its ultimate goal, with SpaceX President Gwynne Shotwell noting that “we’re not moon people.” However, Mars makes sense only if we think the technology is ready to safely support humans on another surface for long periods of time. Furthermore, budget restrictions make an ambitious goal like going immediately to Mars an unlikely prospect. Why are we afraid to take the seemingly necessary baby steps of developing the technology for a long-term base on a surface that can be reached in mere days instead of months?
The tendency to want to skip a lunar settlement is not a new phenomenon. Even before the first landing on the moon, U.S. and NASA political leadership was contemplating the future of manned space, and few of the visions involved a lunar base. The early space program was driven by Cold War competition with Moscow, and the kinds of ideas that circulated at the time involved milestones that seemed novel such as reusable spaceplanes, nuclear-powered rockets, space stations and missions to Mars. When the United States was on the verge of a series of landings on the moon, building a permanent base just didn’t seem like much of a new giant leap.
NASA's Constellation
NASA’s Constellation program, featuring the Orion manned capsule set atop the Ares 1 launch vehicle, was meant to send astronauts back to the moon. Credit: NASA
The idea of a lunar landing mission was not reintroduced seriously until the George W. Bush administration and the introduction of the Constellation program. This program came at a complex time for NASA: The space shuttle was recovering from the Columbia disaster, the space station was in the midst of construction and the United States found itself with large budget deficits. However, despite its budgetary and schedule problems, which are common in any serious aerospace development project from space programs to jumbo-jet development, it provided NASA with a vision and a goal that were reasonable and sensible as next steps toward a long-term future of exploration beyond Earth.
Constellation was nevertheless canceled, and we have since returned to a most uncommon sense.
The decision to avoid any sort of lunar activity in current space policy may have been biased by the Obama administration’s desire to move as far away as possible from the policies of the previous administration. Regardless of the cause, discussion of returning to the moon is no longer on the table.
Without the moon, the only feasible mission that NASA could come up with that is within reach given the current technology and budget is the Asteroid Redirect Mission.
Even planetary scientists have spoken out against the mission, finding that it will provide little scientific value. It will also provide limited engineering and technology value, if we assume that our long-term goal is to permanently settle space. The experience gained from this sort of flight has little applicability to planetary resource utilization, long-term life support or other technologies needed for settlement.
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If we are to have a program of manned space exploration, we must decide what the long-term goals of such a program should be, and we should align our actions with those goals. When resources such as funding are limited, space agencies and political leaders should not squander these limited resources on missions that make no sense. Instead, the limited funding should be used to continue toward our long-term goals, accepting a slower pace or slight scale-back in mission scope.
Establishing a permanent human settlement in space is a noble goal, one that will eventually redefine humanity. Like explorers before us, it is also not a goal that will be achieved in a short period of time. We would be wise to keep our eyes on that goal and the road needed to get us there. And the next likely stop on that road is a permanent home just above our heads, on the surface of the brightest light in the night sky.

Paul Brower is an aerospace systems engineer on the operations team for the O3b Networks satellite fleet. He previously worked in mission control at NASA for 10 years.
- See more at: http://spacenews.com/op-ed-why-the-u-s-gave-up-on-the-moon/#sthash.czfTscvg.dpuf

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Does the Past Exist Yet? Evidence Suggests Your Past Isn’t Set in Stone


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Excerpt from robertlanza.com
By Robert Lanza 

Recent discoveries require us to rethink our understanding of history. “The histories of the universe,” said renowned physicist Stephen Hawking “depend on what is being measured, contrary to the usual idea that the universe has an objective observer-independent history.”

Is it possible we live and die in a world of illusions? Physics tells us that objects exist in a suspended state until observed, when they collapse in to just one outcome. Paradoxically, whether events happened in the past may not be determined until sometime in your future – and may even depend on actions that you haven’t taken yet.

In 2002, scientists carried out an amazing experiment, which showed that particles of light “photons” knew — in advance — what their distant twins would do in the future. They tested the communication between pairs of photons — whether to be either a wave or a particle. Researchers stretched the distance one of the photons had to take to reach its detector, so that the other photon would hit its own detector first. The photons taking this path already finished their journeys — they either collapse into a particle or don’t before their twin encounters a scrambling device.
Somehow, the particles acted on this information before it happened, and across distances instantaneously as if there was no space or time between them. They decided not to become particles before their twin ever encountered the scrambler. It doesn’t matter how we set up the experiment. Our mind and its knowledge is the only thing that determines how they behave. Experiments consistently confirm these observer-dependent effects.

More recently (Science 315, 966, 2007), scientists in France shot photons into an apparatus, and showed that what they did could retroactively change something that had already happened. As the photons passed a fork in the apparatus, they had to decide whether to behave like particles or waves when they hit a beam splitter. 
Later on – well after the photons passed the fork – the experimenter could randomly switch a second beam splitter on and off. It turns out that what the observer decided at that point, determined what the particle actually did at the fork in the past. At that moment, the experimenter chose his history.

Of course, we live in the same world. Particles have a range of possible states, and it’s not until observed that they take on properties. So until the present is determined, how can there be a past? According to visionary physicist John Wheeler (who coined the word “black hole”), “The quantum principle shows that there is a sense in which what an observer will do in the future defines what happens in the past.” Part of the past is locked in when you observe things and the “probability waves collapse.” But there’s still uncertainty, for instance, as to what’s underneath your feet. If you dig a hole, there’s a probability you’ll find a boulder. Say you hit a boulder, the glacial movements of the past that account for the rock being in exactly that spot will change as described in the Science experiment.

But what about dinosaur fossils? Fossils are really no different than anything else in nature. For instance, the carbon atoms in your body are “fossils” created in the heart of exploding supernova stars. 
Bottom line: reality begins and ends with the observer. “We are participators,” Wheeler said “in bringing about something of the universe in the distant past.” Before his death, he stated that when observing light from a quasar, we set up a quantum observation on an enormously large scale. It means, he said, the measurements made on the light now, determines the path it took billions of years ago.

Like the light from Wheeler’s quasar, historical events such as who killed JFK, might also depend on events that haven’t occurred yet. There’s enough uncertainty that it could be one person in one set of circumstances, or another person in another. Although JFK was assassinated, you only possess fragments of information about the event. But as you investigate, you collapse more and more reality. According to biocentrism, space and time are relative to the individual observer – we each carry them around like turtles with shells.

History is a biological phenomenon — it’s the logic of what you, the animal observer experiences. You have multiple possible futures, each with a different history like in the Science experiment. Consider the JFK example: say two gunmen shot at JFK, and there was an equal chance one or the other killed him. This would be a situation much like the famous Schrödinger’s cat experiment, in which the cat is both alive and dead — both possibilities exist until you open the box and investigate.

“We must re-think all that we have ever learned about the past, human evolution and the nature of reality, if we are ever to find our true place in the cosmos,” says Constance Hilliard, a historian of science at UNT. Choices you haven’t made yet might determine which of your childhood friends are still alive, or whether your dog got hit by a car yesterday. In fact, you might even collapse realities that determine whether Noah’s Ark sank. “The universe,” said John Haldane, “is not only queerer than we suppose, but queerer than we can suppose.”

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Rare & severe geomagnetic storm enables Aurora Borealis to be seen from U.S. tonight

Excerpt from mashable.com Thanks to a rare, severe geomagnetic storm, the Northern Lights may be visible on Tuesday night in areas far to the south of its typical home in the Arctic.  The northern tier of the U.S., from Washington State to Michiga...

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This Alien Color Catalog May Help Us Spot Life on Other Planets






Excerpt from smithsonianmag.com


In the hunt for alien life, our first glimpse of extraterrestrials may be in the rainbow of colors seen coming from the surface of an exoplanet.

That's the deceptively simple idea behind a study led by Siddharth Hegde at the Max Planck Institute for Astronomy in Germany. Seen from light-years away, plants on Earth give our planet a distinctive hue in the near-infrared, a phenomenon called red edge. That's because the chlorophyll in plants absorbs most visible light waves but starts to become transparent to wavelengths on the redder end of the spectrum. An extraterrestrial looking at Earth through a telescope could match this reflected color with the presence of oxygen in our atmosphere and conclude there is life here.


exoplanets palette
Eight of the 137 microorganism samples used to measure biosignatures for the catalog of reflection signatures of Earth life forms. In each panel, the top is a regular photograph of the sample and the bottom is a micrograph, a version of the top image zoomed-in 400 times.



Plants, though, have only been around for 500 million years—a relative blip in our planet's 4.6-billion-year history. Microbes dominated the scene for some 2.5 billion years in the past, and some studies suggest they will rule the Earth again for much of its future. So Hegde and his team gathered 137 species of microorganisms that all have different pigments and that reflect light in specific ways. By building up a library of the microbes' reflectance spectra—the types of colors those microscopic critters reflect from a distance—scientists examining the light from habitable exoplanets can have a plethora of possible signals to search for, the team argues this week in the Proceedings of the National Academy of Sciences.

"No one had looked at the wide range of diverse life on Earth and asked how we could potentially spot such life on other planets, and include life from extreme environments on Earth that could be the 'norm' on other planets," Lisa Kaltenegger, a co-author on the study, says via email. "You can use it to model an Earth that is different and has different widespread biota and look how it would appear to our telescopes."

To make sure they got enough diversity, the researchers looked at temperate-dwelling microbes as well as creatures that live in extreme environments like deserts, mineral springs, hydrothermal vents or volcanically active areas.

While it might seem that alien life could take a huge variety of forms—for instance, something like the silicon-based Horta from Star Trek—it's possible to narrow things down if we restrict the search to life as we know it. First, any life-form that is carbon-based and uses water as a solvent isn't going to like the short wavelengths of light far in the ultraviolet, because this high-energy UV can damage organic molecules. At the other end of the spectrum, any molecule that alien plants (or their analogues) use to photosynthesize won't be picking up light that's too far into the infrared, because there's not enough energy at those longer wavelengths.

In addition, far-infrared light is hard to see through an Earth-like atmosphere because the gases block a lot of these waves, and whatever heat the planet emits will drown out any signal from surface life. That means the researchers restricted their library to the reflected colors we can see when looking at wavelengths in the visible part of the spectrum, the longest wavelength UV and short-wave infrared.

The library won't be much use if we can't see the planets' surfaces in the first place, and that's where the next generation of telescopes comes in, Kaltenegger says. The James Webb Space Telescope, scheduled for launch in 2018, should be able to see the spectra of relatively small exoplanet atmospheres and help scientists work out their chemical compositions, but it won't be able to see any reflected spectra from material at the surface. Luckily, there are other planned telescopes that should be able to do the job. The European Extremely Large Telescope, a 40-meter instrument in Chile, will be complete by 2022. And NASA's Wide Field Infrared Survey Telescope, which is funded and in its design stages, should be up and running by the mid-2020s.

Another issue is whether natural geologic or chemical processes could look like life and create a false signal. So far the pigments from life-forms look a lot different from those reflected by minerals, but the team hasn't examined all the possibilities either, says Kaltenegger. They hope to do more testing in the future as they build up the digital library, which is now online and free for anyone to explore at biosignatures.astro.cornell.edu.

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Warp in spacetime lets astronomers watch the same star explode four times



Excerpt from csmonitor.com

Thanks to a phenomenon known as gravitational lensing, the Hubble Space Telescope has captured four images of the same supernova explosion.

For the first time, a cosmic magnifying glass has allowed scientists to see the same star explosion four times, possibly offering a revealing glimpse into these explosive stellar deaths and the nature of the accelerating universe.

Astronomers using the Hubble Space Telescope have captured four images of a supernova explosion in deep space thanks to a galaxy located between Earth and the massive star explosion. You can see how Hubble saw the supernova in this NASA video. The galaxy cluster warped the fabric of space and time around it — like a bowling ball placed on a bed sheet — allowing scientists to see the supernova in four images.

"It was predicted 50 years ago that a supernova could be gravitationally lensed like this, but it's taken a long time for someone to find an example," lead study author Patrick Kelly, an astronomer at the University of California, Berkeley told Space.com. "It's fun to have been able to find the first one." 

The supernova, which was discovered on Nov. 11, 2014, is located about 9.3 billion light-years away from Earth, near the edge of the observable universe. The researchers have named the distant supernova SN Refsdal in honor of the late Norwegian astrophysicist Sjur Refsdal, a pioneer of gravitational lensing studies. Due to gravitational lensing, "the supernova appears 20 times brighter than its normal brightness," study co-author Jens Hjorth, head of the Dark Cosmology Centre at the Niels Bohr Institute at the University of Copenhagen, said in a statement.
The lensing galaxy, which is about 5 billion light-years from Earth, is part of a large cluster of galaxies known MACS J1149.6+2223. In 2009, astronomers discovered that this cluster was the source of the largest known image of a spiral galaxy ever seen through a gravitational lens.

The four images of the supernova each appeared separately over the course of a few weeks. This is because light can take various paths around and through a gravitational lens, arriving at Earth at different times.

Using gravity as a lens

Gravity is created when matter warps the fabric of reality. The greater the mass of an object, the more space-time curves around that object and the stronger its gravitational pull, the discovery enshrined in Einstein's theory of general relativity, which celebrates its centennial this year.

As a result, gravity can also bend light like a lens, meaning objects see n behind powerful gravitational fields, such as those of massive galaxies, are magnified. Gravitational lensing was first discovered in 1979, and today gravitational lenses can help astronomers see features otherwise too distant and faint to detect with even the largest telescopes.

"These gravitational lenses are like a natural magnifying glass. It's like having a much bigger telescope," Kelly said in a statement. "We can get magnifications of up to 100 times by looking through these galaxy clusters."

When light is far from a gravitationally lensing mass, or if the gravitationally lensing mass is not especially large, only "weak lensing" occurs, barely distorting the light. However, when the light comes from almost exactly behind the gravitationally lensing mass, "strong lensing" can happen. 

When a strongly lensed object occupies a large patch of space — for instance, if it's a galaxy — it can get smeared into an "Einstein ring" surrounding a gravitationally lensing mass. However, strong lensing of small, pointlike items — for instance, super-bright objects known as quasars — often produces multiple images surrounding the gravitationally lensing mass, resulting in a so-called "Einstein cross."

The observations of SN Refsdal mark the first time astronomers on Earth have witnessed strong lensing of a  supernova, with four images of an exploding star arrayed as an Einstein cross.

An expanding universe

These new findings could help scientists measure the accelerating rate at which the universe is expanding, researchers say.

A computer model of the lensing cluster suggests the scientists missed chances to see the lensed supernova 50 and 10 years ago. However, the model also suggests more images of the explosion will repeat again within the next 10 years.

The timing of when all these images of the supernova arrive depends on the gravitational pull of the matter generating the gravitational lens. So, by measuring those times, the researchers hope to map how visible normal matter and invisible dark matter is distributed in the lensing galaxy.

Dark matter is currently one of the greatest mysteries in science, a poorly understood substance thought to make up five-sixths of all matter in the universe. A better understanding of how dark matter is behaving in this gravitationally lensing cluster might help shed light on the material's nature, Kelly said.

Analyzing when the images arrive could also help scientists pinpoint the rate at which the universe is expanding. Although there are already several ways to measure the cosmic expansion rate, "there has been a lot of heated debate between different methods, so it'd be interesting to see how this new technique might affect the area," Kelly said. "It's always nice to have completely independent measurements of the same quantity."

The scientists detailed their findings in the March 6 issue of the journal Science.

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Hubble’s ‘Einstein Cross’ Marks the Space-Warping Spot


Image: Einstein Cross revealed
Flash from the supernova's blast has been warped into four points of light surrounding an elliptical galaxy in a cluster called MACS J1149.2+2223, which is 5 billion light-years away in the constellation Leo.


Excerpt from nbcnews.com
By Alan Boyle


One hundred years after Albert Einstein published his theory of general relativity, the Hubble Space Telescope has provided a demonstration of the theory at work: a picture of a distant galaxy so massive that its gravitational field is bending the light from an even more distant supernova. 

The image, released Thursday, shows how the flash from the supernova's blast has been warped into four points of light surrounding an elliptical galaxy in a cluster called MACS J1149.2+2223, which is 5 billion light-years away in the constellation Leo. 

"It really threw me for a loop when I spotted the four images surrounding the galaxy," Patrick Kelly, an astronomer from the University of California at Berkeley, said in a news release. "It was a complete surprise." 

Maybe it shouldn't have been. The configuration is known as an Einstein Cross. It's a well-known but rarely seen effect of gravitational lensing, which is in line with Einstein's assertion that a massive object warps the fabric of space-time — and thus warps the path taken by light rays around the object. 

In this case, the light rays are coming from a stellar explosion that's directly behind the galaxy, but 4.3 million light-years more distant. Computer models suggest that the four-pointed cross will eventually fade away, to be followed within the next five years by the reappearance of the supernova's flash as a single image. 

Kelly is part of a research collaboration known as the Grism Lens Amplified Survey from Space, or GLASS. The collaboration is working with the Frontier Field Supernova team, or FrontierSN, to analyze the exploding star. He's also the lead author of a paper on the phenomenon that's being published this week by the journal Science as part of a package marking the 100th anniversary of Einstein's general relativity theory. 

The researchers suggest that a high-resolution analysis of the gravitational lensing effect can lead to better measurements of cosmic distances and galactic masses, including the contribution from dark matter. The Hubble team says the faraway supernova has been named "Refsdal" in honor of Norwegian astronomer Sjur Refsdal, who proposed using time-delayed images from a lensed supernova to study the expansion of the universe. 

"Astronomers have been looking to find one ever since," UCLA astronomer Tommaso Treu, the GLASS project's principal investigator, said in Thursday's news release. "The long wait is over!" 

The Einstein Cross is the subject of a Google+ Hangout at 3 p.m. ET Thursday, presented by the Hubble science team. You can watch the event now or later via YouTube. Check out a preprint version of the Science report.

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Recent Disappearances & Strangeness in the Bermuda Triangle

Excerpt from paranormal.lovetoknow.com By Michelle Radcliff The Bermuda Triangle is an area of mostly open ocean located between Bermuda, Miami, Florida and San Juan, Puerto Rico. The unexplained disappearances of hundreds of ships and air...

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Bees Do It, Humans Do It ~ Bees can experience false memories, scientists say



Excerpt from csmonitor.com


Researchers at Queen Mary University of London have found the first evidence of false memories in non-human animals.

It has long been known that humans – even those of us who aren't famous news anchors – tend to recall events that did not actually occur. The same is likely true for mice: In 2013, scientists at MIT induced false memories of trauma in mice, and the following year, they used light to manipulate mice brains to turn painful memories into pleasant ones.

Now, researchers at Queen Mary University of London have shown for the first time that insects, too, can create false memories. Using a classic Pavlovian experiment, co-authors Kathryn Hunt and Lars Chittka determined that bumblebees sometimes combine the details of past memories to form new ones. Their findings were published today in Current Biology.
“I suspect the phenomenon may be widespread in the animal kingdom," Dr. Chittka said in a written statement to the Monitor.
First, Chittka and Dr. Hunt trained their buzzing subjects to expect a reward if they visited two artificial flowers – one solid yellow, the other with black-and-white rings. The order didn’t matter, so long as the bee visited both flowers. In later tests, they would present a choice of the original two flower types, plus one new one. The third type was a combination of the first two, featuring yellow-and-white rings. At first, the bees consistently selected the original two flowers, the ones that offered a reward.

But a good night’s sleep seemed to change all that. One to three days after training, the bees became confused and started incorrectly choosing the yellow-and-white flower (up to fifty percent of the time). They seemed to associate that pattern with a reward, despite having never actually seen it before. In other words, the bumblebees combined the memories of two previous stimuli to generate a new, false memory.

“Bees might, on occasion, form merged memories of flower patterns visited in the past,” Chittka said. “Should a bee unexpectedly encounter real flowers that match these false memories, they might experience a kind of deja-vu and visit these flowers expecting a rich reward.”

Bees have a rather limited brain capacity, Chittka says, so it’s probably useful for them to “economize” by storing generalized memories instead of minute details.

“In bees, for example, the ability to learn more than one flower type is certainly useful,” Chittka said, “as is the ability to extract commonalities of multiple flower patterns. But this very ability might come at the cost of bees merging memories from multiple sequential experiences.”

Chittka has studied memory in bumblebees for two decades. Bees can be raised and kept in a lab setting, so they make excellent long-term test subjects.

“They are [also] exceptionally clever animals that can memorize the colors, patterns, and scents of multiple flower species – as well as navigate efficiently over long distances,” Chittka said.

In past studies, it was assumed that animals that failed to perform learned tasks had either forgotten them or hadn’t really learned them in the first place. Chittka’s research seems to show that animal memory mechanisms are much more elaborate – at least when it comes to bumblebees.

“I think we need to move beyond understanding animal memory as either storing or not storing stimuli or episodes,” Chittka said. “The contents of memory are dynamic. It is clear from studies on human memory that they do not just fade over time, but can also change and integrate with other memories to form new information. The same is likely to be the case in many animals.”

Chittka hopes this study will lead to a greater biological understanding of false memories – in animals and humans alike. He says that false memories aren’t really a “bug in the system,” but a side effect of complex brains that strive to learn the big picture and to prepare for new experiences.

“Errors in human memory range from misremembering minor details of events to generating illusory memories of entire episodes,” Chittka said. “These inaccuracies have wide-ranging implications in crime witness accounts and in the courtroom, but I believe that – like the quirks of information processing that occur in well known optical illusions – they really are the byproduct of otherwise adaptive processes.”

“The ability to memorize the overarching principles of a number of different events might help us respond in previously un-encountered situations,” Chittka added. “But these abilities might come at the expense of remembering every detail correctly.”
So, if generating false memories goes hand in hand with having a nervous system, does all this leave Brian Williams off the hook?

“It is possible that he conflated the memories,” Chittka said, “depending on his individual vulnerability to witnessing a traumatic event, plus a possible susceptibility to false memories – there is substantial inter-person variation with respect to this. It is equally possible that he was just ‘showing off’ when reporting the incident, and is now resorting to a simple lie to try to escape embarrassment. That is impossible for me to diagnose.”

But if Mr. Williams genuinely did misremember his would-be brush with death, Chittka says he shouldn’t be vilified.

“You cannot morally condemn someone for reporting something they think really did happen to them,” Chittka said. “You cannot blame an Alzheimer patient for forgetting to blow out the candle, even if they burn down the house as a result. In the same way, you can't blame someone who misremembers a crime as a result of false memory processes."

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‘God Particle’ analogue spotted outside a supercollider: Scientists find Higgs mode in a superconductor


The God Particle, which is believed to be responsible for all the mass in the universe, was discovered in 2012 using a Cern's supercollider. In this image two high-energy photons collide. The yellow lines are the measured tracks of other particles produced in the collision, which helped lead to the discovery of the God particle
The God Particle, which is believed to be responsible for all the mass in the universe, was discovered in 2012 using a Cern's supercollider. In this image two high-energy photons collide. The yellow lines are the measured tracks of other particles produced in the collision, which helped lead to the discovery of the God particle.


Excerpt from dailymail.co.uk
  • God Particle is believed to be responsible for all the mass in the universe
  • Particle was discovered in 2012 using a Cern's supercollider in Geneva
  • uperconductor experiment suggests the particle could be detected without the huge amounts of energy used at by the Large Hadron Collider
  • LHC is due to come back online next month after an upgrade that has given it a big boost in energy

Scientists have discovered a simulated version of the elusive 'God particle' using superconductors.

The God Particle, which is believed to be responsible for all the mass in the universe, was discovered in 2012 using a Cern's supercollider.

The superconductor experiment suggests that the Higgs particle could be detected without the huge amounts of energy used at by the Large Hadron Collider. 
The results could help scientists better understand how this mysterious particle – also known as the Higgs boson – behaves in different conditions.

'Just as the Cern experiments revealed the existence of the Higgs boson in a high-energy accelerator environment, we have now revealed a Higgs boson analogue in superconductors,' said researcher Aviad Frydman from Bar-Ilan University.

Superconductors are a type of metal that, when cooled to low temperatures, allow electrons to pass through freely.

'The Higgs mode was never actually observed in superconductors because of technical difficulties - difficulties that we've managed to overcome,' Professor Frydman said.

The superconductor experiment suggests that the Higgs particle could be detected without the huge amounts of energy used at by the Large Hadron Collider (pictured)
The superconductor experiment suggests that the Higgs particle could be detected without the huge amounts of energy used at by the Large Hadron Collider (pictured)

WHAT IS THE GOD PARTICLE? 

The 'God Particle', also known as the Higgs boson, was a missing piece in the jigsaw for physicists in trying to understand how the universe works.

Scientists believe that a fraction of a second after the Big Bang that gave birth to the universe, an invisible energy field, called the Higgs field, formed.

This has been described as a kind of 'cosmic treacle' across the universe. 

As particles passed through it, they picked up mass, giving them size and shape and allowing them to form the atoms that make up you, everything around you and everything in the universe.

This was the theory proposed in 1964 by former grammar school boy Professor Higgs that has now been confirmed.

Without the Higgs field particles would simply whizz around space in the same way as light does.

A boson is a type of sub-atomic particle. Every energy field has a specific particle that governs its interaction with what's around it. 

To try to pin it down, scientists at the Large Hadron Collider near Geneva smashed together beams of protons – the 'hearts of atoms' – at close to the speed of light, recreating conditions that existed a fraction of a second after the Big Bang.

Although they would rapidly decay, they should have left a recognisable footprint. This footprint was found in 2012.

The main difficulty was that the superconducting material would decay into something known as particle-hole pairs.

Large amounts of energy – which are usually needed to excite the Higgs mode - tend to break apart the electron pairs that act as the material's charge.

Professor Frydman and his colleagues solved this problem by using ultra-thin superconducting films of Niobium Nitrite (NbN) and Indium Oxide (InO) as something known as the 'superconductor-insulator critical point.'

This is a state in which recent theory predicted the decay of the Higgs would no longer occur.

In this way, they could still excite a Higgs mode even at relatively low energies.

'The parallel phenomenon in superconductors occurs on a different energy scale entirely - just one-thousandth of a single electronvolt,' Professor Frydman added.

'What's exciting is to see how, even in these highly disparate systems, the same fundamental physics is at work.'

The different approach help solve one of the longstanding mysteries of fundamental physics.

The discovery of the Higgs boson verified the Standard Model, which predicted that particles gain mass by passing through a field that slows down their movement through the vacuum of space.

To try to pin it down, scientists at the Large Hadron Collider near Geneva smashed together beams of protons – the 'hearts of atoms' – at close to the speed of light, recreating conditions that existed a fraction of a second after the Big Bang.

Although they would rapidly decay, the also left a recognisable footprint.

Professor Higgs, 83, has been waiting since 1964 for science to catch up with his ideas about the Higgs boson
Professor Higgs, 83, has been waiting since 1964 for science to catch up with his ideas about the Higgs boson

According to Professor Frydman, observation of the Higgs mechanism in superconductors is significant because it reveals how a single type of physical process behaves under different energy conditions.

'Exciting the Higgs mode in a particle accelerator requires enormous energy levels - measured in giga-electronvolts, or 109 eV,' Professor Frydman says.

'The parallel phenomenon in superconductors occurs on a different energy scale entirely - just one-thousandth of a single electronvolt.

'What's exciting is to see how, even in these highly disparate systems, the same fundamental physics is at work.'

The LHC is due to come back online in March after an upgrade that has given it a big boost in energy.

'With this new energy level, the (collider) will open new horizons for physics and for future discoveries,' CERN Director General Rolf Heuer said in a statement.
'I'm looking forward to seeing what nature has in store for us.'

Cern's collider is buried in a 27-km (17-mile) tunnel straddling the Franco-Swiss border at the foot of the Jura mountains.

The LHC in Geneva will come back online in March after an upgrade that has given it a big boost in energy
The LHC in Geneva will come back online in March after an upgrade that has given it a big boost in energy

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Study finally answers why it smells so good after it rains

Excerpt from usatoday.comIt turns out tiny bubbles may be to thank for that earthy smell we get after it rains, according to a study from researchers at the Massachusetts Institute of Technology.Youngsoo Joung and Cullen R. Buie used high-speed came...

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