Tag: separate (page 3 of 10)

The Weirdest, Coolest Stuff We’ve Learned About Rosetta’s Comet So Far

January 28, 2015 / / 0 Comments


Various features on a smooth part of the comet's surface in the region named Imhotep.


Excerpt from wired.com

The Rosetta spacecraft has been studying comet 67P/Churyumov-Gerasimenko up close since August, collecting data of unprecedented detail and taking pictures of a starkly beautiful comet-scape. While the Philae lander has enjoyed much of the spotlight—partly thanks to its now-famous triple landing—Rosetta has been making plenty of its own discoveries.  

One of the biggest came last month, when scientists found that the chemical signature of the comet’s water is nothing like that on Earth, contradicting the theory that crashing comets supplied our planet with water. Comet 67P belongs to the Jupiter family of comets, and the findings also imply that these kinds of comets were formed at a wider range of distances from the sun than previously thought, says Michael A’Hearn, a planetary scientist at the University of Maryland, College Park, and member of the Rosetta science team.  

Today, scientists have published the first big set of results from Rosetta in a slew of papers in the journal Science. The results include measurements and analyses of the comet’s shape, structure, surface, and the surrounding dust and gas particles. Here are just a few of the amazing things they’ve discovered about Rosetta’s comet so far: 

The surface is fantastically weird  

The comet has quite the textured landscape, covered with steep cliffs, boulders, weird bumps, cracks, pits, and smooth terrain. There are fractures of all sizes, including one that’s several yards wide and stretches for more than half a mile along the comet’s neck. Researchers don’t yet know what caused these cracks.  The pits have steep sides and flat bottoms, ranging in size from a few tens to hundreds of feet wide. Jets of dust shoot out from some of the pits, suggesting that the ejection of material formed these features.  Another strange feature is what scientists are calling goosebumps—weird bumpy patches found particularly on steep slopes.

While other features such as pits and fractures range in sizes, all of the goosebumps are about 10 feet wide. No one knows what kind of process would make the bumps, but whatever it is could have played an important part in the comet’s formation. It may be breezy  Rosetta spotted dune- and ripple-like patterns,wind tails behind rocks, and even moats surrounding rocks, suggesting that a light breeze may blow dust along the surface. Such a gentle wind would have to come from gases leaking from below.

Because of the extremely low gravity on the comet, it wouldn’t take a strong gust to blow things around. It may have formed from two separate pieces  Or not. The most distinct feature of comet 67P is its odd, two-lobed shape, which resembles a duck. Although scientists have seen this lobed structure in other comets before, namely Borrelly and Hartley 2, none are as pronounced as comet 67P’s. Borrelly and Hartley 2 look more like elongated potatoes while 67P has a clearly defined head and body. The strange shape suggests the comet was once two separate pieces called cometesimals—what are now the duck’s head and body—that stuck together. 

The other possibility is that erosion ate away the parts around the neck. Preliminary evidence points to the first hypothesis.

“Probably most of us on the OSIRIS team lean toward thinking it was two cometesimals,” A’Hearn said. (OSIRIS is one of Rosetta’s imaging instruments.) But the scientists won’t have conclusive evidence until they study the comet in more detail. For example, they now see layering along the neck—if erosion carved out the comet’s duck shape, they should find the same same layering pattern continuing onto the other side of the neck. 

Black, with a tinge of red  

Even Rosetta’s color pictures show a grayish comet, but if you were to see it in person, you would see a pitch-black chunk of dust and ice, as it reflects only six percent of incoming light. By comparison, the moon reflects 12 percent of incoming light and Earth reflects 31 percent. But comet 67P’s not completely black, as it has a hint of red. Water, water, nowhere?  The comet’s covered in opaque, organic compounds. Although comet 67P is undoubtedly icy, it hardly shows any water ice on its surface at all. 

Which isn’t too surprising, as comets Tempel 1 and Hartley 2 didn’t have much ice on their surfaces either, A’Hearn says. Rosetta has yet to see sunlight reach every side of the comet yet, so there may still be some icy patches hidden from view.  But, researchers do see the comet spraying water vapor into space, which means water ice likely lies just beneath the surface. The ice doesn’t have to be more than a centimeter deep to be invisible from the infrared instruments that detect the ice. Indeed, the data from Philae’s first bounce suggested that there’s a hard layer of ice beneath 4 to 8 inches of dust. 

This duck floats  

If you could find a big enough pond, that is. Like other known comets, the density of comet 67P is about half that of water ice. Initial measurements reveal that it’s also very porous—as much as 80 percent of it may be empty space. Rosetta has found depressions, which may have formed when the surface collapsed over particularly porous material underneath. 

Different from every angle

As the comet nears the sun, it heats up, and ices and other volatile chemicals sublimate, spraying gases into space. So far, the most prominent gases that have been ejected are water vapor, carbon dioxide, and carbon monoxide. They spew out in different amounts from different parts of the comet. In particular, a lot of the water has been observed gushing out from the neck.

The comet will continue to get more active as it reaches its closest approach to the sun in mid-August. It will burst with stronger jets of gas and dust, and maybe even blast off chunks of itself. If the comet is this interesting now, A’Hearn says, just wait until it gets to its nearest point to the sun, when it’s just 1.29 times farther from the sun than Earth is.

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A Physicist’s Explanation of Why the Soul May Exist

January 19, 2015 / / 0 Comments







By Tara Maclsaac
Excerpt from
theepochtimes.com
 Henry Stapp is a theoretical physicist at the University of California's Lawrence Berkeley Laboratory, specializing in the mathematical and logical foundations of quantum mechanics. - See more at: http://www.nourfoundation.com/speakers/henry-p-stapp-phd.html#sthash.ZJS7Zrm3.dpuf
Dr. Henry Stapp is a theoretical physicist at the University of California's Lawrence Berkeley Laboratory, specializing in the mathematical and logical foundations of quantum mechanics. - See more at: http://www.nourfoundation.com/speakers/henry-p-stapp-phd.html#sthash.ZJS7Zrm3.dpuf



Henry P. Stapp is a theoretical physicist at the University of California–Berkeley who worked with some of the founding fathers of quantum mechanics. He does not seek to prove that the soul exists, but he does say that the existence of the soul fits within the laws of physics.

He does not seek to prove that the soul exists, but he does say that the existence of the soul fits within the laws of physics.

It is not true to say belief in the soul is unscientific, according to Stapp. Here the word “soul” refers to a personality independent of the brain or the rest of the human body that can survive beyond death.  In his paper, “Compatibility of Contemporary Physical Theory With Personality Survival,” he wrote: “Strong doubts about personality survival based solely on the belief that postmortem survival is incompatible with the laws of physics are unfounded.”
He works with the Copenhagen interpretation of quantum mechanics—more or less the interpretation used by some of the founders of quantum mechanics, Niels Bohr and Werner Heisenberg. Even Bohr and Heisenberg had some disagreements on how quantum mechanics works, and understandings of the theory since that time have also been diverse. Stapp’s paper on the Copenhagen interpretation has been influential. It was written in the 1970s and Heisenberg wrote an appendix for it. 

Stapp noted of his own concepts: “There has been no hint in my previous descriptions (or conception) of this orthodox quantum mechanics of any notion of personality survival.”

Why Quantum Theory Could Hint at Life After Death

Stapp explains that the founders of quantum theory required scientists to essentially cut the world into two parts. Above the cut, classical mathematics could describe the physical processes empirically experienced. Below the cut, quantum mathematics describes a realm “which does not entail complete physical determinism.”

Of this realm below the cut, Stapp wrote: “One generally finds that the evolved state of the system below the cut cannot be matched to any conceivable classical description of the properties visible to observers.”

So how do scientists observe the invisible? They choose particular properties of the quantum system and set up apparatus to view their effects on the physical processes “above the cut.”

The key is the experimenter’s choice. When working with the quantum system, the observer’s choice has been shown to physically impact what manifests and can be observed above the cut. 

Stapp cited Bohr’s analogy for this interaction between a scientist and his experiment results: “[It's like] a blind man with a cane: when the cane is held loosely, the boundary between the person and the external world is the divide between hand and cane; but when held tightly the cane becomes part of the probing self: the person feels that he himself extends to the tip of the cane.”

The physical and mental are connected in a dynamic way. In terms of the relationship between mind and brain, it seems the observer can hold in place a chosen brain activity that would otherwise be fleeting. This is a choice similar to the choice a scientist makes when deciding which properties of the quantum system to study. 

The quantum explanation of how the mind and brain can be separate or different, yet connected by the laws of physics “is a welcome revelation,” wrote Stapp. “It solves a problem that has plagued both science and philosophy for centuries—the imagined science-mandated need either to equate mind with brain, or to make the brain dynamically independent of the mind.”

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The Kinross Air Force Base Incident ~ Did a jet disappear while chasing a UFO?

January 16, 2015 / / 0 Comments


A Northrop F-89C Scorpion, like the one flown by Moncla and Wilson. (credit: Flight Collection)


Excerpt from ufoevidence.org
On the evening of 23 November 1953, an Air Force radar controller became alerted to an "unidentified target" over Lake Superior, and an F-89C Scorpion jet was scrambled from Kinross AFB. Radar controllers watched as the F-89 closed in on the UFO, and then sat stunned in amazement as the two blips merged on the screen, and the UFO left. The F-89 and it’s two man crew, pilot Felix Moncla and radar operator Robert Wilson, were never found, even after a thorough search of the area.
Press article, regarding the incident, in the Wisconsin State Journal (Madison, WI), Nov. 25, 1953.

1st Lt. Felix E. "Gene" Moncla, Jr., pilot of the F89C Scorpion jet. Moncla was accompanied by radar operator Robert Wilson in the rear seat.

"The Disappearance of Lt. Felix Moncla"

The channel that connects Lake Superior with the other Great Lakes flows through the Soo Locks near Saulte Ste. Marie, Michigan. On one side of the channel is the U.S., and on the other side is Canada. The fact that this area is on a U.S. national border makes it a restricted airspace. As such, it was monitored by the Air Defense Command in 1953.

On the evening of 23 November 1953, an Air Defense Command Ground Intercept radar controller at Truax AFB became alerted to an "unidentified target" over Soo Locks. He sounded the alert, and an F-89C Scorpion jet was scrambled from nearby Kinross Field. The jet was piloted by 1st Lieutenant Felix Moncla, Jr., with 2nd Lieutenant Robert Wilson in the rear seat as radar operator.

Ground Control vectored the jet toward the target, noting that the target changed course as the F-89 approached it at over 500 mph. Lt. Wilson had problems tracking the target on his onboard radar, so ground control continued to direct the jet to the target. For thirty minutes, the jet pursued the radar blip and began to close the gap as the UFO accelerated out over Lake Superior.

As Ground Control watched, the gap between the two blips on the radar screen grew smaller and smaller until the two blips became one blip. Ground Control thought that Moncla had flown over the target and that the two blips would separate again as he moved past it.

That didn't happen. Suddenly, the single blip flashed off the screen and the radar screen was clear of any return at all.

Frantically, Ground Control tried to contact the F-89 by radio. There was no response. Marking the last radar position, Ground Control dispatched an emergency message to Search and Rescue. That last sighting was about seventy miles off Keweenaw Point in upper Michigan, at an altitude of 8,000 feet, approximately 160 miles northwest of Soo Locks.

After an all night air/sea rescue search, not a trace of the plane or the men was ever found. No debris, no oil slick, nothing was ever found.

Officials at Norton Air Force Base Flying Safety Division issued a statement that "the pilot probably suffered from vertigo and crashed into the lake." However, this was merely speculation and was based on hearsay reports that Moncla was prone to vertigo.

The Air Force explained the unknown radar target at first as a Canadian DC-3, then later as a RCAF jet. Canadian officials responded that there were no Canadian aircraft in the airspace over the lake at any time during the chase. The Air Force finally stated that the F-89 had exploded at high altitude, ignoring the fact that this would have left a lot of debris on the lake surface.

NICAP investigators found that mentions of Moncla's mission - chasing an unidentified target - had been obliterated from official records. Project Bluebook files simply listed the case as an "accident."

Off the record, those that were present in the Ground Control radar room that day have expressed other opinions. They think that whatever the F-89 was chasing directly caused the disappearance of the jet...

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Study Shows Dogs Can Process Human Speech

November 28, 2014 / / 0 Comments

Excerpt from techtimes.com When you talk to your dog, he or she is listening to what you say in a surprisingly sophisticated and even human-like manner, a new study in Britain suggests.While past studies have provided strong evidence that dogs ...

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Study: Neanderthals were not human after all, but separate species

November 20, 2014 / / 0 Comments

  Excerpt from  dailydigestnews.comThe nose knows whether or not Neanderthals are members of our own species. Turns out the differences in the Neanderthal nose compared to that of modern day humans could be substantial enough to consider N...

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Are we sending aliens the right messages?

November 12, 2014 / / 0 Comments


(Nasa)


bbc.com

Artist Carrie Paterson has long dreamed of beaming messages far out to the emptiness of space. Except her messages would have an extra dimension – smell.

By broadcasting formulae of aromatic chemicals, she says, aliens could reconstruct all sorts of whiffs that help to define life on Earth: animal blood and faeces, sweet floral and citrus scents or benzene to show our global dependence on the car. This way intelligent life forms on distant planets who may not see or hear as we do, says Paterson, could explore us through smell, one of the most primitive and ubiquitous senses of all.
(Wikipedia)
It is nearly 40 years since the Arecibo facility sent messages out into space (Wikipedia)

Her idea is only the latest in a list of attempts to hail intelligent life outside of the Solar System. Forty years ago this month, the Arecibo radio telescope in Puerto Rico sent an iconic picture message into space – and we’ve arguably been broadcasting to aliens ever since we invented TV and radio.

However in recent years, astronomers, artists, linguists and anthropologists have been converging on the idea that creating comprehensible messages for aliens is much harder than it seems. This week, Paterson and others discussed the difficulties of talking to our cosmic neighbours at a conference called Communicating Across the Cosmos, held by Seti (Search for Extraterrestrial Intelligence). It seems our traditional ways of communicating through pictures and language may well be unintelligible – or worse, be catastrophically misconstrued. So how should we be talking to ET?

Lost in translation?

We have always wanted to send messages about humanity beyond the planet. According to Albert Harrison, a space psychologist and author of Starstruck: Cosmic Visions in Science, Religion and Folklore, the first serious designs for contacting alien life appeared two centuries ago, though they never got off the ground.

In the 1800s, mathematician Carl Gauss proposed cutting down lines of trees in a densely forested area and replanting the strips with wheat or rye, Harrison wrote in his book. “The contrasting colours would form a giant triangle and three squares known as a Pythagoras figure which could be seen from the Moon or even Mars.” Not long after, the astronomer Joseph von Littrow proposed creating huge water-filled channels topped with kerosene. “Igniting them at night showed geometric patterns such as triangles that Martians would interpret as a sign of intelligence, not nature.”

But in the 20th Century, we began to broadcast in earnest. The message sent by Arecibo hoped to make first contact on its 21,000 year journey to the edge of the Milky Way. The sketches it contained, made from just 1,679 digital bits, look cute to us today, very much of the ‘Pong’ video game generation.  Just before then, Nasa’s Pioneer 10 and 11 space probes each carried a metal calling card bolted onto their frame with symbols and drawings on the plaque, showing a naked man and woman.

Yet it’s possible that these kinds of message may turn out to be incomprehensible to aliens; they might find it as cryptic as we find Stone Age etchings.

Antique tech

“Linear drawings of a male and a female homo sapiens are legible to contemporary humans,” says Marek Kultys, a London-based science communications designer. ”But the interceptors of Pioneer 10 could well assume we are made of several separate body parts (i.e. faces, hair and the man’s chest drawn as a separate closed shapes) and our body surface is home for long worm-like beings (the single lines defining knees, abdomens or collarbones.).”

Man-made tech may also be an issue. The most basic requirement for understanding Voyager’s Golden Record, launched 35 years ago and now way out beyond Pluto, is a record player. Aliens able to play it at 16 and 2/3 revolutions a minute will hear audio greetings in 55 world languages, including a message of ‘Peace and Friendship’ from former United Nations Secretary General Kurt Waldheim. But how many Earthlings today have record players, let alone extraterrestrials?
(Nasa)
Our sights and sounds of Earth might be unintelligible to an alien audience (Nasa)



Time capsule

Inevitably such messages become outdated too, like time capsules. Consider the case of the Oglethorpe Atlanta Crypt of Civilization – a time capsule sealed on Earth in 1940, complete with a dry martini and a poster of Gone With the Wind. It was intended as a snapshot of 20th Century life for future humans, not aliens, but like an intergalactic message, may only give a limited picture to future generations. When, in 61,000 years, the Oglethorpe time capsule is opened, would Gone With The Wind have stood the test of time?

(Nasa)
This message was taken into the stars by Pioneer - but we have no idea if aliens would be able to understand it (Nasa)

Kultys argues that all these factors should be taken into account when we calculate the likelihood of communicating with intelligent life. The astronomer Frank Drake’s famous equation allows anyone to calculate how many alien species are, based on likely values of seven different factors. At a UK Royal Society meeting in 2010 Drake estimated there are roughly 10,000 detectable civilisations in the galaxy. Yet Kultys points out that we should also factor in how many aliens are using the same channel of communications as us, are as willing to contact us as we are them, whose language we hope to learn, and who are physically similar to us.

Another barrier we might consider is the long distance nature of trans-cosmos communication. It means that many years ‒ even a thousand ‒ could pass between sending a message and receiving a reply. Paterson sees romance in that. “Our hope for communication with another intelligent civilisation has a melancholic aspect to it. 
We are on an island in a vast, dark space. Imagine if communication… became like an exchange of perfumed love letters with the quiet agony of expectation... Will we meet? Will we be as the other imagined? Will the other be able to understand us?”

Ready for an answer?

Anthropologist John Traphagan of the University of Texas in Austin has been asking the same question, though his view is more cautious. "When it comes to ET, you'll get a signal of some kind; not much information and very long periods between ‘Hi, how are you?’ and whatever comes back. We may just shrug our shoulders and say 'This is boring’, and soon forget about it or, if the time lag wasn't too long, we might use the minimal information we get from our slow-speed conversation to invent what we think they're like and invent a kind concept of what they're after.”
(20th Century Fox)
The aliens in Independence Day (1996) did not come in peace (20th Century Fox)
While we have been sending out messages, we have not been preparing the planet for what happens when we get an interstellar return call. First contact could cause global panic. We might assume those answering are bent on galactic domination or, perhaps less likely, that they are peaceful when in fact they’re nasty.

Consider how easy it is to mess up human-to-human communications; I got Traphagan’s first name wrong when I e-mailed him for this article. An apology within minutes cleared up the confusion, yet if he had been an alien anthropologist on some distant planet it would have taken much longer to fix. He later confessed: "I could have thought this is a snooty English journalist and our conversation might never have happened."

Even if Earth’s interstellar messaging committees weeded out the typos, cultural gaffes are always a possibility. These can only be avoided by understanding the alien’s culture – something that’s not easy to do, especially when you’ve never met those you’re communicating with.

Rosy picture

So, what is the best way to communicate? This is still up for grabs – perhaps it’s via smell, or some other technique we haven’t discovered yet. Clearly, creating a message that is timeless, free of cultural bias and universally comprehensible would be no mean feat.

But for starters, being honest about who we are is important if we want to have an extra-terrestrial dialogue lasting centuries, says Douglas Vakoch, director of interstellar message composition at Seti. (Otherwise, intelligent civilisations who’ve decoded our radio and TV signals might smell a rat.)

(Nasa)
The golden discs aboard the Voyager spacecraft require aliens to understand how to play a record (Nasa)

“Let's not try to hide our shortcomings,” says Vakoch. “The message we should send to another world is straightforward: We are a young civilisation, in the throes of our technological adolescence. We're facing a lot of problems here on Earth, and we're not even sure that we'll be around as a species when their reply comes in. But in spite of all of these challenges, we humans also have hope – especially hope in ourselves."


Yet ultimately what matters, says Paterson, is that they stop and consider the beings who sent them a message; the people who wanted to say: “Here are some important things. Here’s our DNA, here is some maths and universal physics. And here is our longing and desire to say “I’m like you, but I’m different.”

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PETA urges FDA to act on alleged SeaWorld dolphin, whale suffering

October 23, 2014 / / 0 Comments


 


dailydigestnews.com


A complaint filed recently against SeaWorld San Diego by the People for the Ethical Treatment of Animals (PETA) alleges that a veterinarian’s recent visit uncovered great psychological distress among captive dolphins, whales, and other creatures, and urged immediate government intervention.

The complaint, which was submitted Monday to the U.S. Department of Agriculture, says that in addition to pyschological harm, dolphins in particular showed signs of attacks from other dolphins due to their close confinement. It urges the agency to investigate the situation.

PETA quoted its own veterinarian Heather Rally, who visited SeaWorld and noted that, among other things, dolphins that had skin conditions and depressed immune systems were interacting with the public, increasing the risk to their health. She said despite the fact that some dolphins had “obvious” pox-like skin lesions, members of the public were allowed to put their hands in the water and touch the dolphins without a SeaWorld supervisor present, according to a PETA statement.

Also, Rally claimed it was common to see bullying and fighting between species at the park, leaving rake marks from the teeth of dominant whales and dolphins on the skin of victims. She said she observed dolphins ramming and chasing other dolphins, as well as attempting to slap them with their flukes. Rake marks leave scars that usually heal within a few months, which Rally said indicates that such aggression is commonplace because of how often she encountered the marks.


PETA claims that aggression between cetaceans in the wild is less common than it is in captivity, since in the latter case dolphins are not able to separate themselves from a dangerous situation.

Rally argued that orcas at SeaWorld suffer great psychological stress as well, since they are used to having strong family bonds and swim great distances. An orca would have to swim 1,900 laps around their tanks to equal the 100 miles per day they usually travel, PETA claimed.

Rally said she observed an orca floating “listlessly” in a lateral position at one point, indicating psychological distress or extreme boredom.

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BBC: Scientists Discover New Race of Human Beings ~ Video Report

October 19, 2014 / / 0 Comments

The ancient humans have been dubbed "Denisovans" after the caves in Siberia where their remains were found. Professor Chris Stringer: "It's nothing short of sensational - we didn't know know how ancient people in China related to these other humans" S...

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NASA Releases Spooky Jack-O-Lantern Sun Image for Halloween

October 16, 2014 / / 0 Comments



NASA jack-o-lantern sun
Eerily grinned Jack-o-lantern Sun

Just in time for Halloween NASA releases an image that is actually a composite of 2 separate images of extreme ultraviolet wavelengths at 171 and 193 Ångströms taken on Oct. 8, 2014. The wavelengths, which are not visible to the unaided eye, have also been colored gold and yellow to create the spooky Halloween jack-o-lantern. 

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Exoplanet is first ‘ice giant’ found outside our solar system

October 16, 2014 / / 0 Comments

Exoplanet is first ‘ice giant’ found outside our solar system

The planet orbits one member of a binary star system 25,000 light-years from Earth.


space.gotnewswire.com


According to an Ohio State University (OSU) statement, a team led by OSU researcher Radek Poleski has discovered the first exoplanet that resembles the planet Uranus in our own solar system. The exoplanet falls into the category of ‘ice giants’, and adds another type of world to the exoplanet roster, which already includes rocky planets similar to Earth and gas giants akin to Jupiter.
The exoplanet is located in a binary star system approximately 25,000 light-years away in the direction of the constellation Sagittarius. One of the member stars is about two-thirds the mass of the Sun, while the other is about one-sixth as massive. The exoplanet itself is four times the mass of Uranus and orbits the larger of the two stars at nearly the same distance as Uranus revolves around the Sun.
The exoplanet and its home star system were found with the 1.3-meter Warsaw Telescope at Las Campanas Observatory in Chile, in the course of the Optical Gravitational Lensing Experiment (OGLE). The star system was discovered in light magnified by an intervening gravitational microlens, and object between Earth and the star system; the light from the more distant object, the binary system in this case, is magnified by the gravity of the microlensing object.
It was actually two separate microlensing events, one in 2008 and the other in 2010, that revealed the existence of the binary system and its ice giant planet. OGLE’s database currently includes 13,000 microlensing events; Poleski is designing software to scrutinize the database for indications of additional exoplanets in other solar systems.
“Only microlensing can detect these cold ice giants that, like Uranus and Neptune, are far away from their host stars. This discovery demonstrates that microlensing is capable of discovering planets in very wide orbits,” Poleski explained.
“We were lucky to see the signal from the planet, its host star, and the companion star. If the orientation had been different, we would have seen only the planet, and we probably would have called it a free-floating planet.”
The new research has been published online in The Astrophysical Journal.

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Mysteries of the Early Human Ancestors #1 ~ Why did we grow large brains?

September 25, 2014 / / 0 Comments

Human brains are about three times as large as those of our early australopithecines ancestors that lived 4 million to 2 million years ago, and for years, scientists have wondered how our brains got so big. A new study suggests social competition could be behind the increase in brain size. Credit NIH, NADA

livescience.com

There are many ways to try to explain why human brains today are so big compared to those of early humans, but the major cause may be social competition, new research suggests. 

But with several competing ideas, the issue remains a matter of debate. 

Compared to almost all other animals, human brains are larger as a percentage of body weight. And since the emergence of the first species in our Homo genus (Homo habilis) about 2 million years ago, the human brain has doubled in size. And when compared to earlier ancestors, such as australopithecines that lived 4 million to 2 million years ago, our brains are three times as large. For years, scientists have wondered what could account for this increase.

The three major hypotheses have focused on climate change, the demands of ecology, and social competition. A new statistical analysis of data on 175 fossil skulls supports the latter hypothesis. 

Behind the hypotheses

The climate idea proposes that dealing with unpredictable weather and major climate shifts may have increased the ability of our ancestors to think ahead and prepare for these environmental changes, which in turn led to a larger, more cognitively adept brain.
The ecology hypothesis states that, as our ancestors migrated away from the equator, they encountered environmental changes, such as less food and other resources. "So you have to be a little bit more clever to figure it out," said David Geary, a professor from the University of Missouri. Also, less parasite exposure could have played a role in the makings of a bigger brain. When your body combats parasites, it cranks up its immune system, which uses up calories that could have gone to boost brain development. Since there are fewer parasites farther away from the equator, migrating north or south could have meant that our predecessors had more opportunity to grow a larger brain because their bodies were not fighting off as many pathogens.

Finally, other researchers think that social competition for scarce resources influenced brain size. As populations grow, more people are contesting for the same number of resources, the thinking goes. Those with a higher social status, who are "a little bit smarter than other folks" will have more access to food and other goods, and their offspring will have a higher chance of survival, Geary said.

Those who are not as socially adept will die off, pushing up the average social "fitness" of the group. "It's that type of process, that competition within a species, for status, for control of resources, that cycles over and over again through multiple generations, that is a process that could easily explain a very, very rapid increase in brain size," Geary said.

Weighing the options

To examine which hypothesis is more likely, Geary and graduate student Drew Bailey analyzed data from 175 skull fossils — from humans and our ancestors — that date back to sometime between 10,000 ago and 2 million years ago.

The team looked at multiple factors, including how old the fossils were, where they were found, what the temperature was and how much the temperature varied at the time the Homo species lived, and the level of parasites in the area. They also looked at the population density of the region in order to measure social competition, "assuming that the more fossils you find in a particular area at a particular time, the more likely the population was larger," Geary said.

They then used a statistical analysis to test all of the variables at once to see how well they predicted brain size. "By far the best predictor was population density," Geary said. "And in fact, it seemed that there was very little change in brain size across our sample of fossil skulls until we hit a certain population size. Once that population density was hit, there was a very quick increase in brain size," he said.

Looking at all the variables together allowed the researchers to "separate out which variables are really important and which variables may be correlated for other reasons," added Geary. While the climate variables were still significant, their importance was much lower than that of population density, he said. The results were published in the March 2009 issue of the journal Human Nature.

Questions linger

The social competition hypothesis "sounds good," said Ralph Holloway, an anthropologist at Columbia University, who studies human brain evolution. But, he adds: "How would you ever go about really testing that with hard data?" 

He points out that the sparse cranium data "doesn’t tell you anything about the differences in populations for Homo erectus, or the differences in populations of Neanderthals." For example, the number of Homo erectus crania that have been found in Africa, Asia, Indonesia and parts of Europe is fewer than 25, and represent the population over hundreds of thousands of years, he said. 

"You can't even know the variation within a group let alone be certain of differences between groups," Holloway said. Larger skulls would be considered successful, but "how would you be able to show that these were in competition?" 

However, Holloway is supportive of the research. "I think these are great ideas that really should be pursued a little bit more," he said. 

Alternative hypotheses

Holloway has another hypothesis for how our brains got so big. He thinks that perhaps increased gestation time in the womb or increased dependency time of children on adults could have a played role. The longer gestation or dependency time "would have required more social cooperation and cognitive sophistication on the part of the parents," he said. Males and females would have needed to differentiate their social roles in a complementary way to help nurture the child. The higher level of cognition needed to perform these tasks could have led to an increase in brain size.


Still other hypotheses look at diet as a factor. Some researchers think that diets high in fish and shellfish could have provided our ancestors with the proper nutrients they needed to grow a big brain.
And another idea is that a decreased rate of cell death may have allowed more brain neurons to be synthesized, leading to bigger noggins. 

Ultimately, no theory can be absolutely proven, and the scant fossil record makes it hard to test hypotheses. "If you calculate a generation as, let's say, 20 years, and you know that any group has to have a minimal breeding size, then the number of fossils that we have that demonstrates hominid evolution is something like 0.000001 percent," Holloway said. "So frankly, I mean, all hypotheses look good."

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Going Within – The Door To Higher Consciousness

September 25, 2014 / / 0 Comments

by Michelle Walling, CHLCWhat does it mean to go within? This question is on the mind of most people who are awakening to the multidimensionality of this reality. Many people have different experiences but there is one similar thread that all people need to know about. The meaning of going within The term “going within” is the method by which we discover who we truly are.To go within simply means to be with yourself, to listen to yourself and your higher self, and to feel yo [...]

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What Would You Take With You to the Afterlife? – Life, Death, Out-of-Body Experiences & the Journey of Consciousness

September 23, 2014 / / 0 Comments




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By Matthew Butler 

People save up for retirement, but how well do we prepare for the journey after? Ancient cultures put great emphasis on the afterlife, because they knew consciousness continued after death. They were right: Out-of-body experiences reveal we really do exist beyond the body. Knowing this truth should inspire us to seek in life what really matters and remains after death – awakened consciousness.

What is the greatest mystery of life? According to a legendary Q&A in the Indian spiritual epic the Mahabharata, the greatest wonder is that countless people die every day, yet those left behind believe they will live forever.
There is a well-known saying that the only certainty in life is death, but our hyper-connected modern society is not exactly inspiring much reflection on what lies beyond the transient.
People put aside savings for retirement, and some take out life insurance to take care of the loved ones they leave behind. This looks after physical needs, but what about the needs of consciousness which continues without the body? What preparations are made for its journey after death – the ultimate journey of a lifetime?
Religious institutions offer a solution to their followers that usually depends on adopting a set of beliefs rather than personal spiritual discovery.  On the other hand, some scientists will tell you with equal conviction that nothing comes after death, so don’t worry about it. Both of these points of view depend on belief, but what if, when the final moment comes, you realise you wasted the great opportunity your life provided? An alternative option is to discover for ourselves why we are here, and what  our place in the universe is, while we are alive and have the opportunity to do something with the knowledge we gain.
Ancient spiritual cultures almost universally placed importance on the individual’s preparations and journey into the afterlife. They clearly understood our existence extended beyond our bodies, and that life and death were best seen with the bigger picture of creation in mind – as part of an ongoing journey of consciousness – with life presenting an amazing opportunity for conscious evolution that we take the fruits from after death.
This was bought home to me in an interesting way during a trip to a museum exhibition showcasing ancient Egyptian afterlife cosmology; it reminded me of the universal nature of the afterlife, and how Near-Death Experiences and Out-of-Body Experiences offer us a glimpse into the reality of existence beyond the body, revealing that awakening consciousness is what creation is really all about.
With our modern culture drifting more and more into shallow short-sighted materialism and faux metaphysics, the need to re-discover and live this deeper purpose to life, so cherished by the ancients, is more important than ever.

A Journey into the Ancient Egyptian Afterlife

A while back I was fortunate to have the opportunity to take a one-way self-guided tour through the ancient Egyptian afterlife, thanks to a special museum exhibition featuring artefacts from the British Museum collection.
The local museum was packed, and we had to wait in a queue before being allowed in. Finally we entered a dimly-lit passage thronging with people, winding past ancient Egyptian artefacts, artworks, tools, scriptures, and mummies.

Geb_Nut_Shu-300x202The exhibit started with depictions of ancient Egyptian cosmology like this. Here the sky goddess is held up above the earth.


It was arranged so that you went on an afterlife “journey” vicariously, stage by stage, in the way the ancient Egyptians understood it. It began with displays showing ancient Egyptian depictions of the world’s creation, and culminated with the judgement of the soul and its journey after death. In between you were shown artefacts demonstrating how ancient Egyptians understood and prepared for death.
There were ancient scrolls of the pyramid texts on display, and ancient art depicting the soul’s journey through the afterlife. A major theme in their art was judgement and the “weighing of the heart”, where a deceased person’s heart was weighed against a feather, and their fate was dependent on their inner qualities and the sum of their actions while alive. Toward the end of the exhibition they had a mockup display of this, with a large set of scales on which you could weigh your “heart” against a feather, while Egyptian Gods looked on from a mural.
After that, you passed into a depiction of the Egyptian paradise before stepping outside into the sunlight. I doubt the effect was intentional on the part of the exhibitors, but after passing through the exhibition’s dark passageway with its ordered depictions of the afterlife, judgment and then stepping into the light, I couldn’t help but think of accounts of near-death experiences, in which people often report passing through a dark tunnel toward the light, and experiencing a life review where they see the consequences of all their actions.

BD_Hunefer_cropped_1-300x231Depiction of the “weighing of the heart”

The exhibit really brought home to me how the ancient Egyptians understood they existed for a purpose that went beyond everyday life. Death was a doorway to the next stage of existence, and their lives were an opportunity to prepare for it. They knew we do not cease to exist when we die, and saw the quest for immortality through awakening consciousness as the real purpose to creation.
From looking at artefacts from different periods, it was apparent the ancient Egyptian understanding of death changed over time. It seemed to me that originally, the emphasis was on living spiritually and obtaining an immortality of the soul, while in later periods their understanding declined into more literal interpretations of preparing the body (rather than consciousness) for the afterlife through mummification, and a preoccupation with the arrangement of one’s burial and tomb with the right spells and amulets.
But I was vividly struck by how through that civilisation’s long and varied existence, the importance of the afterlife always reigned supreme, and being prepared for life after death was absolutely central to existence. Death, and therefore life, was taken very seriously.

I couldn’t help but notice a stark contrast between our modern culture and theirs. It was a bit like being in some kind of time warp, where two very different cultures collided. The artefacts of the Egyptians gave a sense of the sacredness of life and creation, but the bustling, noisy crowds of modern onlookers apparently saw this ancient preoccupation with the afterlife as mere novelty and amusement. How different ancient Egypt was to our modern society where the reality, and inevitability, of death is given little thought or preparation, and the understanding that consciousness continues after death is often summarily discounted and ridiculed.
I highly doubt that many people who attended the exhibition paused to reflect on whether they would continue to exist after death and, if so, how? And why are we here anyway? This was driven home when, just prior to reaching the scales of “judgement”, I noticed a whiteboard, styled with papyrus veneer, with a pertinent question written at the top.

What would you take with you to the afterlife?

Good question. A pen hung from the board, inviting people to write their response underneath. The answers ranged from the sentimental, to the mundane, to the silly.

WP_000293-EDIT1-1024x845How would you answer the question?

Some wanted to take their friends and family with them, while others wanted to take things like their iPhone, make-up, favourite band, football team, favourite rock star, chocolate, alcohol, and so forth.
A “time machine” was perhaps the only clever response. I could see the benefit of that if you realised you had wasted your life. I don’t think it’s really an option however.
This brought home how we don’t take death and the meaning of our lives anywhere near as seriously as we should today. The ancients knew a lot more about life and death than we do. We have lost their ancient wisdom, and with it the understanding of the amazing opportunity our existence in this universe presents.
This is a serious problem. Our consciousness will continue to exist without the body. But if we don’t question our existence and why we are here, we will not awaken consciousness and we will never reach our true potential.

Near-Death Experiences and the Reality of Existence Beyond the Body

Existence after death is not something the ancient Egyptians invented. Concepts of an afterlife are so common across geographically isolated cultures around the world that it cannot simply be dismissed as a coincidence. There may be cultural differences in the details, but the understanding that we continue existing without the body has been pretty much universal for thousands of years.
In fact, the burial of the dead and the realisation of an afterlife are considered some of the most important hallmarks of cultural development in Stone Age people. It was a sign of intelligence distinguishing people from animals, and paved the way for the development of more sophisticated civilisations.

Hieronymus_Bosch_013The medieval painting ‘Ascent of the Blessed’ by Hieronymus Bosch shows the light at the end of the tunnel common to NDE accounts

Near-Death Experiences (NDEs) provide compelling anecdotal evidence that the afterlife mythologies of the world share a real common source and that consciousness exists beyond the brain. In NDEs, people who are clinically dead or close to death go through experiences that follow a pattern with universal traits, which they recall after being revived.
These include an out of body experience, where they leave their body and realise they are separate from it, perhaps seeing their body lying beneath them. Then they may go on a journey, which may feature common aspects like travelling through a tunnel, and a life review, where a person is shown everything they have done, and feels the effects of their actions toward others, whether good or bad.
Although some scientists speculate that these phenomena may be caused by the brain, the reality is that these experiences have occurred when patients are clinically brain dead, and it has not been proven these experiences are produced biologically. Furthermore, there is no ultimate proof that consciousness is produced by the brain anyway, although this is a strongly-held assumption among those entrenched in materialistic beliefs.
NDEs challenge rigid materialistic beliefs about life. In light of the prevalence and commonality of NDEs, some scientists now suggest that consciousness interacts with the brain rather than being produced by it. Rather, the brain is a conduit through which consciousness can express itself, much like the way a computer is a conduit for the internet, but the internet continues to exist when the computer is switched off.
NDEs are increasingly reported in the modern world due to improvements in health care leading to more people being revived, but they are also an ancient phenomenon. Research by the scholar Gregory Shushan found there are universal afterlife experiences which underpinned both modern NDE accounts and ancient afterlife mythologies. His research involved an in-depth comparative analysis of afterlife conceptions of five ancient civilisations (Old and Middle Kingdom Egypt, Sumerian and Old Babylonian Mesopotamia, Vedic India, pre-Buddhist China, and pre-Columbian Mesoamerica) and compared them to modern NDE accounts. He demonstrated that, although there were some variations in the details based on the cultural origin, there were specific recurring similarities that reappeared too consistently to be mere coincidence, suggesting that, “afterlife conceptions are not entirely culturally-determined and… appear to be universal or quasi-universal to some degree”.

Life is an Opportunity to Awaken Consciousness

Realising that you are consciousness, and continue to exist without the body, awakens you to the bigger picture of life. It puts your whole life in perspective.
In an NDE life review, people tend to see that what really matters in life is not how much money they made or what they achieved in a given field, but how they treated other people, and whether they acted with love. These experiences tend to change people’s lives, inspiring them to be more spiritual.
afterlife
Discovering you exist beyond the body can be a life-changing revelation

We do not need to have an NDE to verify that we exist without the body, or to have life-changing experiences. Through astral projection, we can have wilful out of body experiences and use these mystical experiences to learn about ourselves and make positive changes in our lives.
Realising that we exist beyond the body can open the door to awakening. You realise that what really matters in life is not what we gain physically, but developing consciousness. Then the question, “what will you take with you to the afterlife” becomes much more meaningful. You can’t take physical things with you when you die like your iPhone, but you can take consciousness. Then you see that the focus on the afterlife in ancient cultures was not a preoccupation with death, but a deep understanding of life, and how to live it in the most meaningful way to bring spiritual benefits to yourself and others, the effects of which continue after death.
States like anger, greed and hatred have their consequences in the world which are bad enough, but who wants to take these states with them to afterlife? If these states don’t bring happiness here, why drag them along after death? Expressions of consciousness like love, wisdom and inner peace are much  better qualities to carry within. By awakening and expressing consciousness in a world filled with ignorance, hatred and darkness, we not only help to make the world a better place, but continue to carry these spiritual qualities in our consciousness when our body is left behind.
Understanding this is so important today. We live in a society bombarded with elite-controlled propaganda and entertainment that not only hides the darker agendas working in the world, but blankets people in ignorance, keeping us from uncovering the deeper potential of our consciousness and empowering ourselves by striving to awaken – which enables us to break free of the grip of darkness that exerts its influence over humanity. Failing to wake up to this agenda has it implications in the world, and also for our consciousness, and it’s consciousness that really counts, both in life and beyond.
So what would you take with you to the afterlife?

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