The Letorians, por Marina Jacobi, 4 de abril de 2018
La querida humanidad al norte de tu planeta es una flota de naves espaciales listas para entrar en
Tag: sea (page 1 of 14)
Irwin Ozborne, ContributorThanksgiving: Celebrating all that we have, and the genocide it took to get it.Thanksgiving is one of the most paradoxical times of the year. We gather together with friends and family in celebration of all that we are thankful for and express our gratitude, at the same time we are encouraged to eat in excess. But the irony really starts the next day on Black Friday. On Thursday we appreciate all the simple things in life, such as having a meal, a roof over [...]
Julian Rose, ContributorThe term ‘food chain’ refers to the steps that constitute the movement of food from its starting point in the field to its end point on the fork. This incorporates processing and ultimate consumption.The food chain operates within a dynamic life cycle. One which expresses the inseparable interconnection between soil, plant, animal and man – and ends back in the soil again. So that if any one element of this cycle is poisoned or weakened, the [...]
by John Assaraf,Nobel Prize winning physicists have proven beyond doubt that the physical world is one large sea of energy that flashes into and out of being in milliseconds, over and over again.Nothing is solid.This is the world of Quantum Physics.They have proven that thoughts are what put together and hold together this ever-changing energy field into the ‘objects’ that we see.So why do we see a person instead of a flashing cluster of energy?Think of a movie [...]
Buck Rogers, Staff WriterThe isolation of Cuba from world economy has meant that the Cuban economy has not been as influenced by global corporations and governments as most other modern nations have. The country is a bit “behind the times” when it comes to cars, industry, technology, and basically all of the luxuries that we consider necessities in the typical consumer lifestyle of the 21st century. As a result, not only are the Cuban people seemingly [...]
Europa is thought to have a subsurface ocean. Salt from this hidden sea might be emerging in long fractures visible in the moon’s crust.
Excerpt earthsky.org
Laboratory experiments have lead to new information about the chemical composition of the mysterious dark material in the long, dark fractures on the surface of Europa, a large moon of Jupiter. Researchers at NASA’s Jet Propulsion Laboratory (JPL) mimicked conditions on Europa’s surface. They now say that the dark material is discolored salt, likely sea salt from below the moon’s icy crust. The journal Geological Research Letters published their study on May 15, 2015.
The scientists say this new insight is important in considering whether this icy moon might be hospitable for extraterrestrial life. The life question is a key one for Europa, since this world is believed to have a liquid ocean beneath its crust. The presence of sea salt on Europa’s surface suggests the ocean is interacting with its rocky seafloor.
Scientists have been intensely curious about Europa since Galileo discovered it in 1610. In recent years, they’ve puzzled over the dark material coating the long, linear fractures on Europa’s observable surface. The material was associated with young terrain on this moon of Jupiter, suggesting that it had erupted from within Europa.
However, the chemical composition of the dark material remained elusive, until now.
Planetary scientist Kevin Hand at JPL led the new study. He said in a statement:
If it’s just salt from the ocean below, that would be a simple and elegant solution for what the dark, mysterious material is.Europa is immersed radiation from Jupiter’s powerful magnetic field, causing high-powered electrons to slam into the moon’s surface. Hand and his team created a laboratory test that mimicked the conditions of Europa’s temperature, pressure, and radiation exposure. They tested a variety of samples including common salt – sodium chloride – and salt water in a vacuum chamber at Europa’s chilly surface temperature of minus 280 degrees Fahrenheit (minus 173 Celsius). They also bombarded the samples with an electron beam to imitate Jupiter’s influence.
After several hours – a time period corresponding to over a century on Europa, the researchers said – the salt samples were observed to go from white to a yellowish brown, the color similar to the features on the icy moon. Hand said:
This work tells us the chemical signature of radiation-baked sodium chloride is a compelling match to spacecraft data for Europa’s mystery material.
A “Europa-in-a-can” laboratory setup at NASA-JPL mimics conditions of temperature, near vacuum and heavy radiation on the surface of Jupiter’s icy moon. Image via NASA/JPL-Caltech
Close-up of salt grains discolored by radiation following exposure in a “Europa-in-a-can” test setup at JPL. Image via NASA/JPL-Caltech
A visit to this icy world would help answer the most tantalizing questions about Europa. Long believed to have a liquid ocean of salt water below its icy surface, this moon continues to display promising conditions for extraterrestrial life.
As Europa orbits Jupiter, it experiences strong tidal forces similar to Earth and the Moon. These forces from Jupiter and the other Jovian moons cause Europa to flex and stretch, which creates heat, and results in Europa having a warm internal temperature than it would with just the heat from the Sun alone.
Recent observable geological activity also creates strong evidence that the subsurface ocean interacts directly with Europa’s rocky interior, making geothermal vents, like those in Earth’s oceans, a strong possibility as well.
These hydrothermal vent ecosystems on Earth thrive with no energy from the sun. Bacteria, shrimp and crustaceans have all been observed in these extreme environments, surviving on what researchers have deemed chemosythesis.
With Europa’s enormous amount of liquid salt water, essential chemical elements and geological activity, this long discovered icy moon appears to be one of the solar systems most promising locations for habitable requirements for life.
However, until a devoted spacecraft visit’s, nothing beyond hopeful speculation can be proven, the researchers say.
Bottom line: Researchers at NASA’s Jet Propulsion Laboratory created laboratory conditions that mimicked those on Jupiter’s large moon Europa, to learn the chemical compositions of the material in long, dark fractures in the moon’s surface. They now believe this material is sea salt, which has emerged to Europa’s surface from its liquid ocean below.
Jack Hanna is the Director Emeritus of the Columbus Zoo and the host of Jack Hanna’s Wild Countdown and Jack Hanna’s Into the Wild television shows.
Primatologist Jane Goodall's recent statement calling for the closing of zoos and aquariums such as Sea World obviously has big money wildlife theme parks very nervous. Firing back with their side of the debate is Jack Hanna, Director Emeritus (which means now retired) of the Columbus Zoo, through a Time.com feature story penned by Hanna entitled, Jack Hanna: What Zoo Critics Don’t Understand, a one-sided dialogue of pro-zoo and pro-aquarium absurdity. Isn't it funny that so often those who possess, let's say, cagey attitudes towards human and animal rights believe it is the rest of us who don't 'understand' something, and if we could just find a way to understand, then we'd see things their way.
This weak and quite scattered opposing view offered by Hanna begins its argument against animal rights supporters and their efforts to free wild life from their theme park imprisonment by first declaring just how popular zoos and aquariums are with folks. Oh well, gee, say no more Jack. Popular? Slavery was pretty popular with some folks too, perhaps we should rethink that whole abolition thing? Do go on. And on Hanna did just that.
This weak and quite scattered opposing view offered by Hanna begins its argument against animal rights supporters and their efforts to free wild life from their theme park imprisonment by first declaring just how popular zoos and aquariums are with folks. Oh well, gee, say no more Jack. Popular? Slavery was pretty popular with some folks too, perhaps we should rethink that whole abolition thing? Do go on. And on Hanna did just that.
Realizing quickly the only direction this lopsided piece could possibly go from that genius insight, I bit down hard and finished the article, which to me read more like a paid endorsement from those establishments that profit greatly from the abduction, caging, and exploitation of defenseless animals. I made it all the way to the point where the popular wildlife celebrity, whose biggest talent appears to be how he makes so many immediately see how the world was such a better place when Steve Irwin was in it, actually said that animals need to be in cages because there's not enough room for them in the wild. Here is the segment written by Jack Hanna as posted on time.com.
"Critics say the only place animals belong is in the wild, but those boundaries are shrinking each day. Having traveled the world, the only places I consider truly “wild” are Antarctica, parts of the Amazon and some places in Africa. Even in Africa, the “wild” places tend to be national parks with guarded boundaries. Animals face many challenges, including habitat loss, poaching, severe weather, and war. The “wild” is not necessarily the idyllic place people imagine..."
And you have just the 'idyllic place' for animals at your Columbus zoo, don't you Jack?
Greg Giles
Excerpt from huffingtonpost.com
It was never in your life plan, certainly never predicted in your high school yearbook.
And yet, here you are. You've gone through a soul-sucking life experience and are suffering from the collateral consequences. Uncertainty, fear and disbelief rule the day. You keep waiting to wake up and find out this was all a bad dream.
The problem is that wishing, wanting and waiting don't help. Whether you're still in the midst of the storm or idling in the aftermath, the truth is that you have to reach down and make the decision that although you may have had no control over what happened to you, you do have control over how you respond and move forward. These six tips will help start you on that journey:
1. Don't Compare Your Blooper Reel to Other's Highlight Reel
At times it may seem like the grass is greener on the other side of the fence. Social media exacerbates this perception because people tend to show only their green patch of lawn and not their backyard full of weeds!
Wouldn't it be refreshing to see someone's perfect vacation pictures captioned: "Don't know how we're really going to pay for this; We're up to our ears in debt! The kids got carsick and puked in the rental car, and Jack and I haven't had sex for weeks! Wish you were here!"
The grass isn't always greener. Everyone has something in life they wish they could undo, redo or erase. They just don't post it on Facebook.
2. Realize That Sometimes You Have No Control Over What Happens to You
Like the saying goes, life is what happens to you when you are making other plans. I truly believe that things happen for you rather than to you to nudge you into growth. When something unexpected happens, ask yourself "What's the lesson here?"
3. Surrender to Your Situation
Surrendering doesn't mean giving in; it simply means you stop fighting the fact that the situation happened. Accept the fact that it occurred, that it sucks, and that yes, it probably was unfair and undeserved.
When you continually try to fight against a situation, it's like trying to swim against a rip current. You can fight it and end up exhausted and pulled out to sea, or you can accept that it is done, swim parallel to it and overcome it. You cannot change what has already occurred but you can change how you respond to it. This is the tipping point to taking your power back.
4. Understand That Your Coping Mechanisms May Be Holding You Hostage
It is natural to feel disbelief, anger and sadness, and to want to blame others for what you are going through. These coping mechanisms are designed to help you deal with the situation at hand. They are also a defense mechanism, a way to push back on the reality of the situation.
The problem is, when you get stuck defending, denying, and blaming, you form an endless loop of negative thoughts that won't stop spinning in your head. The part of your brain that is controlling the loop is your ego. When you learn to harness your ego, you can transform the way you think and move past these self-destructive thoughts.
5. Harness Your Ego
Your ego is part of your consciousness, and it competes with your higher self, or spirit, for control of your thoughts. Your ego is fear-based and your higher self is love-based. The two cannot coexist because the higher self simply does not recognize fear. Think of the ego as the darkness and the higher self as the light switch; once the light goes on darkness cannot exist.
The ego thrives on fear and separation in order to control your thoughts. It causes you to think you need to be better because you're not good enough or are lacking in some way. The egoic brain creates this fear of inferiority and you react by putting others down as a way to raise your sense of self-worth up.
You can recognize your ego at work when you are critical or judgmental of others, when you take on the role of victim, or when you blame others rather than looking inward. When you feel self-important, when you feel the need to be right, and when anger, jealousy, and self-importance take center stage, that's your ego, and it isn't helping you. It creates a false sense of self.
Once you are aware that your ego is talking, you have begun the process of winning the mind chatter war in your head. Your awareness helps you realize that you no longer have to react to the fear it is creating. Your thoughts are not you but are of the ego. Remember that your ego and your higher self cannot co-exist; When you recognize the ego it has to take a back seat to your higher self. You then can move above these thoughts and shift your perspective from negative thoughts to ones that serve you positively.
6. Create Calm and Gratitude
The ego loves for you to focus on your past, on what you lost. What if you shift the way you look at your situation and focus on what you gained as a result?
What did you learn as a result of the trial? Are you more compassionate, less judgmental? Is your house calmer or cleaner? Did you start taking better care of yourself emotionally or physically? Are you finally putting yourself first?
Focusing on what you are grateful for instead of what you lost is a mindset that creates a calmer, happier you. And that is something to be grateful for!
Tired of feeling like you'll never be happy again? Mary Holloway empowers women to reach down and find their inner warrior. Mary is a sought after speaker, resilience coach, and most importantly, a survivor of soul crushing life experiences. She is the founder of Resilience Café and the creator of the Boom Bounce Wow Resilience Method. Mary believes that every woman has an incredible warrior within her that can help her take back her life and emerge better, stronger, happier, and surprisingly thankful for the experience. She knows that women can choose not to be defined by their situation but rather by how they respond to it.
Follow Mary at ResilienceCafe.com...
Excerpt from cnet.comEnceladus may have a warm ocean beneath its icy surface, but it may also be shooting through that crust in big sheets, perhaps filled with sea monkeys. We already know that Saturn's ...
Excerpt from huffingtonpost.com Sometimes, it's the most fantastical, fictional characters that do the best job of teaching us about reality.New York Times bestselling author T.A. Barron spent decades creating the magical image of Merlin the wiza...
Excerpt from techtimes.comScientists are seeking a core sample from the Chicxulub crater that marks the remains of an asteroid impact which ended the age of the dinosaurs nearly 66 million years ago.That geological feature will be probed by scientist...
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| Dutch national women's field hockey team |
Excerpt from news.sciencemag.org
ByMartin Enserink
AMSTERDAM—Insecure about your height? You may want to avoid this tiny country by the North Sea, whose population has gained an impressive 20 centimeters in the past 150 years and is now officially the tallest on the planet. Scientists chalk up most of that increase to rising wealth, a rich diet, and good health care, but a new study suggests something else is going on as well: The Dutch growth spurt may be an example of human evolution in action.
The study, published online today in the Proceedings of the Royal Society B, shows that tall Dutch men on average have more children than their shorter counterparts, and that more of their children survive. That suggests genes that help make people tall are becoming more frequent among the Dutch, says behavioral biologist and lead author Gert Stulp of the London School of Hygiene & Tropical Medicine.
"This study drives home the message that the human population is still subject to natural selection," says Stephen Stearns, an evolutionary biologist at Yale University who wasn't involved in the study. "It strikes at the core of our understanding of human nature, and how malleable it is." It also confirms what Stearns knows from personal experience about the population in the northern Netherlands, where the study took place: "Boy, they are tall."
For many years, the U.S. population was the tallest in the world. In the 18th century, American men were 5 to 8 centimeters taller than those in the Netherlands. Today, Americans are the fattest, but they lost the race for height to northern Europeans—including Danes, Norwegians, Swedes, and Estonians—sometime in the 20th century.
Just how these peoples became so tall isn't clear, however. Genetics has an important effect on body height: Scientists have found at least 180 genes that influence how tall you become. Each one has only a small effect, but together, they may explain up to 80% of the variation in height within a population. Yet environmental factors play a huge role as well. The children of Japanese immigrants to Hawaii, for instance, grew much taller than their parents. Scientists assume that a diet rich in milk and meat played a major role.
The Dutch have become so much taller in such a short period that scientists chalk most of it up to their changing environment. As the Netherlands developed, it became one of the world's largest producers and consumers of cheese and milk. An increasingly egalitarian distribution of wealth and universal access to health care may also have helped.
Still, scientists wonder whether natural selection has played a role as well. For men, being tall is associated with better health, attractiveness to the opposite sex, a better education, and higher income—all of which could lead to more reproductive success, Stulp says.
Yet studies in the United States don't show this. Stulp's own research among Wisconsinites born between 1937 and 1940, for instance, showed that average-sized men had more children than shorter and taller men, and shorter women had more children than those of average height. Taken together, Stulp says, this suggests natural selection in the United States pulls in the opposite direction of environmental factors like diet, making people shorter instead of taller. That may explain why the growth in average American height has leveled off.
Stulp—who says his towering 2-meter frame did not influence his research interest—wondered if the same was true in his native country. To find out, he and his colleagues turned to a database tracking key life data for almost 100,000 people in the country's three northern provinces. The researchers included only people over 45 who were born in the Netherlands to Dutch-born parents. This way, they had a relatively accurate number of total children per subject (most people stop having children after 45) and they also avoided the effects of immigration.
In the remaining sample of 42,616 people, taller men had more children on average, despite the fact that they had their first child at a higher age. The effect was small—an extra 0.24 children at most for taller men—but highly significant. (Taller men also had a smaller chance of remaining childless, and a higher chance of having a partner.) The same effect wasn't seen in women, who had the highest reproductive success when they were of average height. The study suggests this may be because taller women had a smaller chance of finding a mate, while shorter women were at higher risk of losing a child.
Because tall men are likely to pass on the genes that made them tall, the outcome suggests that—in contrast to Americans—the Dutch population is evolving to become taller, Stulp says. "This is not what we've seen in other studies—that's what makes it exciting," says evolutionary biologist Simon Verhulst of the University of Groningen in the Netherlands, who was Stulp's Ph.D. adviser but wasn't involved in the current study. Verhulst points out that the team can't be certain that genes involved in height are actually becoming more frequent, however, as the authors acknowledge.
The study suggests that sexual selection is at work in the Dutch population, Stearns says: Dutch women may prefer taller men because they expect them to have more resources to invest in their children. But there are also other possibilities. It could be that taller men are more resistant to disease, Stearns says, or that they are more likely to divorce and start a second family. "It will be a difficult question to answer.”
Another question is why tall men in Holland are at a reproductive advantage but those in the United States are not. Stulp says he can only speculate. One reason may be that humans often choose a partner who's not much shorter or taller than they are themselves. Because shorter women in the United States have more children, tall men may do worse than those of average height because they're less likely to partner with a short woman.
In the end, Stearns says, the advantage of tall Dutchmen may be only temporary. Often in evolution, natural selection will favor one trend for a number of generations, followed by a stabilization or even a return to the opposite trend. In the United States, selection for height appears to have occurred several centuries ago, leading to taller men, and then it stopped. "Perhaps the Dutch caught up and actually overshot the American men," he says.
The study, published online today in the Proceedings of the Royal Society B, shows that tall Dutch men on average have more children than their shorter counterparts, and that more of their children survive. That suggests genes that help make people tall are becoming more frequent among the Dutch, says behavioral biologist and lead author Gert Stulp of the London School of Hygiene & Tropical Medicine.
"This study drives home the message that the human population is still subject to natural selection," says Stephen Stearns, an evolutionary biologist at Yale University who wasn't involved in the study. "It strikes at the core of our understanding of human nature, and how malleable it is." It also confirms what Stearns knows from personal experience about the population in the northern Netherlands, where the study took place: "Boy, they are tall."
For many years, the U.S. population was the tallest in the world. In the 18th century, American men were 5 to 8 centimeters taller than those in the Netherlands. Today, Americans are the fattest, but they lost the race for height to northern Europeans—including Danes, Norwegians, Swedes, and Estonians—sometime in the 20th century.
Just how these peoples became so tall isn't clear, however. Genetics has an important effect on body height: Scientists have found at least 180 genes that influence how tall you become. Each one has only a small effect, but together, they may explain up to 80% of the variation in height within a population. Yet environmental factors play a huge role as well. The children of Japanese immigrants to Hawaii, for instance, grew much taller than their parents. Scientists assume that a diet rich in milk and meat played a major role.
The Dutch have become so much taller in such a short period that scientists chalk most of it up to their changing environment. As the Netherlands developed, it became one of the world's largest producers and consumers of cheese and milk. An increasingly egalitarian distribution of wealth and universal access to health care may also have helped.
Still, scientists wonder whether natural selection has played a role as well. For men, being tall is associated with better health, attractiveness to the opposite sex, a better education, and higher income—all of which could lead to more reproductive success, Stulp says.
Yet studies in the United States don't show this. Stulp's own research among Wisconsinites born between 1937 and 1940, for instance, showed that average-sized men had more children than shorter and taller men, and shorter women had more children than those of average height. Taken together, Stulp says, this suggests natural selection in the United States pulls in the opposite direction of environmental factors like diet, making people shorter instead of taller. That may explain why the growth in average American height has leveled off.
Stulp—who says his towering 2-meter frame did not influence his research interest—wondered if the same was true in his native country. To find out, he and his colleagues turned to a database tracking key life data for almost 100,000 people in the country's three northern provinces. The researchers included only people over 45 who were born in the Netherlands to Dutch-born parents. This way, they had a relatively accurate number of total children per subject (most people stop having children after 45) and they also avoided the effects of immigration.
In the remaining sample of 42,616 people, taller men had more children on average, despite the fact that they had their first child at a higher age. The effect was small—an extra 0.24 children at most for taller men—but highly significant. (Taller men also had a smaller chance of remaining childless, and a higher chance of having a partner.) The same effect wasn't seen in women, who had the highest reproductive success when they were of average height. The study suggests this may be because taller women had a smaller chance of finding a mate, while shorter women were at higher risk of losing a child.
Because tall men are likely to pass on the genes that made them tall, the outcome suggests that—in contrast to Americans—the Dutch population is evolving to become taller, Stulp says. "This is not what we've seen in other studies—that's what makes it exciting," says evolutionary biologist Simon Verhulst of the University of Groningen in the Netherlands, who was Stulp's Ph.D. adviser but wasn't involved in the current study. Verhulst points out that the team can't be certain that genes involved in height are actually becoming more frequent, however, as the authors acknowledge.
The study suggests that sexual selection is at work in the Dutch population, Stearns says: Dutch women may prefer taller men because they expect them to have more resources to invest in their children. But there are also other possibilities. It could be that taller men are more resistant to disease, Stearns says, or that they are more likely to divorce and start a second family. "It will be a difficult question to answer.”
Another question is why tall men in Holland are at a reproductive advantage but those in the United States are not. Stulp says he can only speculate. One reason may be that humans often choose a partner who's not much shorter or taller than they are themselves. Because shorter women in the United States have more children, tall men may do worse than those of average height because they're less likely to partner with a short woman.
In the end, Stearns says, the advantage of tall Dutchmen may be only temporary. Often in evolution, natural selection will favor one trend for a number of generations, followed by a stabilization or even a return to the opposite trend. In the United States, selection for height appears to have occurred several centuries ago, leading to taller men, and then it stopped. "Perhaps the Dutch caught up and actually overshot the American men," he says.
dailysciencejournal.com
An animated and dramatic 3D video released by NASA has revealed the international space agency plans of exploring the depths of largest sea on the Titan, Kraken Mare.
NASA is planning to launch a submarine in the Kraken Mare Sea with an aim of studying the depth.
Titan is one of the 62 moons of the planet Saturn. Titan has its own and interesting atmosphere compared to other 61.
Click to zoom
A spacecraft named Cassini has been trying to study the Titan’s atmosphere since 2004. Most of the area of the moon Titan is covered by large bodies of methane and ethane in liquid form.
The submarine will definitely help more compared to Cassini spacecraft to measure and map the shorelines or sea.
While releasing the video the scientists from NASA has stated that the submarine will definitely help in exploring the history of the moon’s climatic conditions and could provide major breakthroughs among the discoveries made till date.
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