Showing posts with label Wow Science. Show all posts
Showing posts with label Wow Science. Show all posts

Thursday, September 22, 2011

Wow! Science - Faster than light travel may be possible.

Neutrinos discovered to break the speed of light.

Antonio Ereditato, spokesman for the researchers, told Reuters that measurements taken over three years showed neutrinos pumped from CERN near Geneva to Gran Sasso in Italy had arrived 60 nanoseconds quicker than light would have done.


"We have high confidence in our results. We have checked and rechecked for anything that could have distorted our measurements but we found nothing," he said. "We now want colleagues to check them independently."

If confirmed, the discovery would undermine Albert Einstein's 1905 theory of special relativity, which says that the speed of light is a "cosmic constant" and that nothing in the universe can travel faster.

That assertion, which has withstood over a century of testing, is one of the key elements of the so-called Standard Model of physics, which attempts to describe the way the universe and everything in it works.

The totally unexpected finding emerged from research by a physicists working on an experiment dubbed OPERA run jointly by the CERN particle research center near Geneva and the Gran Sasso Laboratory in central Italy.

A total of 15,000 beams of neutrinos -- tiny particles that pervade the cosmos -- were fired over a period of 3 years from CERN toward Gran Sasso 730 (500 miles) km away, where they were picked up by giant detectors.

Light would have covered the distance in around 2.4 thousandths of a second, but the neutrinos took 60 nanoseconds -- or 60 billionths of a second -- less than light beams would have taken.

"It is a tiny difference," said Ereditato, who also works at Berne University in Switzerland, "but conceptually it is incredibly important. The finding is so startling that, for the moment, everybody should be very prudent."
Hah! Take that you smug physicists with your "warp speed is impossible" talk!

Sunday, September 18, 2011

Wow! Science - Evolution Division.

According to this article at Io9, brains developed separately in the different branches of the mollusk phylum.


University. Kevin Kocot and his team examined the genetic sequences of the eight main branches of the mollusk phylum. They hoped to determine which branches are most closely related to which others, and in doing so provide a clearer history of the specifics of mollusk evolution. Until now, it was assumed that the two mollusk groups with the most highly organized central nervous systems, the cephalopods (octopus, cuttlefish, squid) and the gastropods (snails and slugs), are the most closely related.

Now it appears that that's actually almost the exact opposite of the truth. According to Kocot's analysis, the gastropods are most closely related to bivalves (clams, mussels, oysters, and scallops), which have far more rudimentary nervous systems and not much of a brain. Even more shockingly, cephalopods - the most intelligent of all the mollusk groups - comes from one of the earliest branches, meaning their evolutionary development predates that of snails, clams, and the rest.

There's no way that cephalopods and gastropods could have evolved together apart from all the other mollusks, which means that their similarly advanced nervous systems must have developed independently. That goes against a lot of longstanding assumptions about the evolution of sophisticated structures, as Kocot's colleague, University of Florida researcher Leonid Moroz, explains:
"Traditionally, most neuroscientists and biologists think complex structures usually evolve only once. We found that the evolution of the complex brain does not happen in a linear progression. Parallel evolution can achieve similar levels of complexity in different groups. I calculated it happened at least four times."
A lot of evolutionary theory has been guided by something akin to Occam's Razor - it's simpler to assume that something as complex as the brain only evolved once in a given group, and that all brainy members of that group come from a single common ancestor. Mollusks appear to be pointing us towards a very different story of evolution, one governed by parallel developments and the repeated emergence of brains in wildly divergent groups. Evolution doesn't have any set goals, but it does appear that it has certain ideas and structures it just keeps coming back to.
That last (emboldened) sentence is strange bit of rejecting final causation while affirming final causation. 

Wednesday, September 07, 2011

Wow! Science - Evolution.

Where did the megafauna of the Ice Age come from?

And yet, although it isn't quite the same as its descendants, all the key adaptations that would allow woolly rhinoceroses to thrive during the ice age were already in place. For instance, the skull shows signs of special adaptations that allowed it to clear snow away using its horn. That allowed the ancient rhino to find vegetation hidden underneath the snow and eke out a decent existence in the Tibetan plateaus.


Full sizeAfter a few hundred thousand years, the woolly rhinoceros was perfectly adapted for life in Tibet. That proved to be a very useful thing, because it was around that time that the entire world basically became Tibet, as the glaciers descended on Eurasia and the world became choked in ice and snow. While the woolly rhinoceros had evolved during a period where most of the world enjoyed a mild climate, it was poised to thrive in this chilly new order.

The woolly rhinoceros skull was the most dramatic find made in the Tibetan highlands, but it was far from the only one. Evidence of nearly thirty different extinct species were found in the Himalayas, including the three-toed horse, snow leopard, and Tibetan antelope. It appears these creatures all evolved in the generally harsh Tibetan climate and then expanded throughout all Eurasia when the ice age began.

This new find could go a long way to clarifying how megafauna like the woolly rhinoceros - which aren't generally known for their ability to quickly adapt to changing environmental conditions - were able to not just survive but thrive during the chilly Pleistocene era. It's possible that almost all of the giant mammals that dominated Europe and Asia during the ice age had their start in the brutal winters of a relatively small area of the Himalayas. So be sure to respect the local fauna the next time you go hiking - assuming we make it to the next ice age, their giant descendants might well rule the world.

Friday, August 26, 2011

Wow! Science -

Scientists witness star being shredded by black hole.

Prepare to have your mind blown.


Back in March, when NASA's Swift spacecraft first detected what scientists believed to be a black hole eating a star 3.8 billion light years from earth, many didn't quite know what it would mean. But now it seems the cosmic event not only sent a beam of X-rays shooting towards earth, but it also rejuvenated the black hole.

NASA has put together a short video imagining the event, which you can see for yourself, below.

"Incredibly, this source is still producing X-rays and may remain bright enough for Swift to observe into next year," said David Burrows, professor of astronomy at Penn State University and lead scientist for the mission's X-Ray Telescope instrument, told NASA. "It behaves unlike anything we've seen before."
NASA's Goddard Space Flight Center explains why matter and X-rays are shooting out of the black hole:

As a star falls toward a black hole, it is ripped apart by intense tides. The gas is corralled into a disk that swirls around the black hole and becomes rapidly heated to temperatures of millions of degrees.
The black hole itself is enormous, potentially four times the size of the one at the center of the Milky Way, according to NASA. Even more incredibly, the massive hole seems to be shooting matter out of its center at 80 to 90 percent of the speed of light.

An event like this has never before been seen by scientists.

Earlier this year, NASA reported that the Swift telescope had detected dual black holes, that is, a supermassive blackhole at the center of a galaxy located extremely close to another galaxy with a blackhole at its center--a rarely observed occurrence.

At the 2011 Ted conference, Janna Levin, a professor of physics and astronomy at Barnard College, spoke to The Huffington Post about the "sound" of a black hole. Though black holes can't be seen directly, Levin likened their resonance to "someone knocking on the door, or mallets banging on a drum."
Space is huge.  What are the odds of a star "wandering by" a black hole with the orientation pointed in just the right direction when humanity has a data collection device pointed in that direction ?

Monday, August 08, 2011

Wow! Science.

Anti-matter "belt" discovered in Van Allen belt.

A thin band of antimatter particles called antiprotons enveloping the Earth has been spotted for the first time.


The find, described in Astrophysical Journal Letters, confirms theoretical work that predicted the Earth's magnetic field could trap antimatter.

The team says a small number of antiprotons lie between the Van Allen belts of trapped "normal" matter.

The researchers say there may be enough to implement a scheme using antimatter to fuel future spacecraft.

The antiprotons were spotted by the Pamela satellite (an acronym for Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics) - launched in 2006 to study the nature of high-energy particles from the Sun and from beyond our Solar System - so-called cosmic rays.

Friday, August 05, 2011

OK, this is just weird.

African rat weaponizes plant toxins:

The African crested rat has been revealed as the first known mammal to use plant poison to defend itself, using the toxins as a weapon against would-be predators.


The peculiar East African rodent, Lophiomys imhausi, uses saliva to transport the toxin, Ouabain, from gnawed branches of the Poison-arrow trees onto its unique wick-like fur.

The unique ability of the rats to part their flank hair, exposing a striking black-and-white fur pattern, has long been known, this elaborate display alone could not explain the animal’s unpalatability to predators.

It turns out that it is the design of this specialised flank hair, and its ability to hold and dispense poison, that makes the difference, according to a group of East African and British scientists.

Saturday, July 23, 2011

Wow! Science.

Human civilization may have emerged 11,000 years ago - or approximately six thousand years before Egypt and Sumeria.

There is a site in southeastern Turkey called Gobekli Tepe that has many intricately carved stone pillars which have been dated, according to Smithsonian magazine, to 11,000 years ago:

Six miles from Urfa, an ancient city in southeastern Turkey, Klaus Schmidt has made one of the most startling archaeological discoveries of our time: massive carved stones about 11,000 years old, crafted and arranged by prehistoric people who had not yet developed metal tools or even pottery. The megaliths predate Stonehenge by some 6,000 years. The place is called Gobekli Tepe, and Schmidt, a German archaeologist who has been working here more than a decade, is convinced it's the site of the world's oldest temple.


Guten Morgen," he says at 5:20 a.m. when his van picks me up at my hotel in Urfa. Thirty minutes later, the van reaches the foot of a grassy hill and parks next to strands of barbed wire. We follow a knot of workmen up the hill to rectangular pits shaded by a corrugated steel roof—the main excavation site. In the pits, standing stones, or pillars, are arranged in circles. Beyond, on the hillside, are four other rings of partially excavated pillars. Each ring has a roughly similar layout: in the center are two large stone T-shaped pillars encircled by slightly smaller stones facing inward. The tallest pillars tower 16 feet and, Schmidt says, weigh between seven and ten tons. As we walk among them, I see that some are blank, while others are elaborately carved: foxes, lions, scorpions and vultures abound, twisting and crawling on the pillars' broad sides.


Schmidt points to the great stone rings, one of them 65 feet across. "This is the first human-built holy place," he says.
Interesting.  I'm not sure about the dating methodology, though:

Schmidt returned a year later with five colleagues and they uncovered the first megaliths, a few buried so close to the surface they were scarred by plows. As the archaeologists dug deeper, they unearthed pillars arranged in circles. Schmidt's team, however, found none of the telltale signs of a settlement: no cooking hearths, houses or trash pits, and none of the clay fertility figurines that litter nearby sites of about the same age. The archaeologists did find evidence of tool use, including stone hammers and blades. And because those artifacts closely resemble others from nearby sites previously carbon-dated to about 9000 B.C., Schmidt and co-workers estimate that Gobekli Tepe's stone structures are the same age. Limited carbon dating undertaken by Schmidt at the site confirms this assessment.
Gobekli Tepe may require a re-thinking of the origins of civilization:

To Schmidt and others, these new findings suggest a novel theory of civilization. Scholars have long believed that only after people learned to farm and live in settled communities did they have the time, organization and resources to construct temples and support complicated social structures. But Schmidt argues it was the other way around: the extensive, coordinated effort to build the monoliths literally laid the groundwork for the development of complex societies.


The immensity of the undertaking at Gobekli Tepe reinforces that view. Schmidt says the monuments could not have been built by ragged bands of hunter-gatherers. To carve, erect and bury rings of seven-ton stone pillars would have required hundreds of workers, all needing to be fed and housed. Hence the eventual emergence of settled communities in the area around 10,000 years ago. "This shows sociocultural changes come first, agriculture comes later," says Stanford University archaeologist Ian Hodder, who excavated Catalhoyuk, a prehistoric settlement 300 miles from Gobekli Tepe. "You can make a good case this area is the real origin of complex Neolithic societies."
I thought that the Gobekli Tepe story might be a nonsense story fabricated by loons, but it seems authentic enough to interest some fairly legitimate mainstream media sources, such as the National Geographic magazine.

Puzzle piled upon puzzle as the excavation continued. For reasons yet unknown, the rings at Göbekli Tepe seem to have regularly lost their power, or at least their charm. Every few decades people buried the pillars and put up new stones—a second, smaller ring, inside the first. Sometimes, later, they installed a third. Then the whole assemblage would be filled in with debris, and an entirely new circle created nearby. The site may have been built, filled in, and built again for centuries.


Bewilderingly, the people at Göbekli Tepe got steadily worse at temple building. The earliest rings are the biggest and most sophisticated, technically and artistically. As time went by, the pillars became smaller, simpler, and were mounted with less and less care. Finally the effort seems to have petered out altogether by 8200 B.C. Göbekli Tepe was all fall and no rise
The National Geographic article also has an interesting observation about why we should be careful when a scientific theory that just fits so nicely into the politically correct theory of the scientists' own culture:

The idea that the Neolithic Revolution was driven by climate change resonated during the 1990s, a time when people were increasingly worried about the effects of modern global warming. It was promoted in countless articles and books and ultimately enshrined in Wikipedia. Yet critics charged that the evidence was weak, not least because Abu Hureyra, Mureybet, and many other sites in northern Syria had been flooded by dams before they could be fully excavated. "You had an entire theory on the origins of human culture essentially based on a half a dozen unusually plump seeds," ancient-grain specialist George Willcox of the National Center for Scientific Research, in France, says. "Isn't it more likely that these grains were puffed during charring or that somebody at Abu Hureyra found some unusual-looking wild rye?"


As the dispute over the Natufians sharpened, Schmidt was carefully working at Göbekli Tepe. And what he was finding would, once again, force many researchers to reassess their ideas.

Anthropologists have assumed that organized religion began as a way of salving the tensions that inevitably arose when hunter-gatherers settled down, became farmers, and developed large societies. Compared to a nomadic band, the society of a village had longer term, more complex aims—storing grain and maintaining permanent homes. Villages would be more likely to accomplish those aims if their members were committed to the collective enterprise. Though primitive religious practices—burying the dead, creating cave art and figurines—had emerged tens of thousands of years earlier, organized religion arose, in this view, only when a common vision of a celestial order was needed to bind together these big, new, fragile groups of humankind. It could also have helped justify the social hierarchy that emerged in a more complex society: Those who rose to power were seen as having a special connection with the gods. Communities of the faithful, united in a common view of the world and their place in it, were more cohesive than ordinary clumps of quarreling people.

Göbekli Tepe, to Schmidt's way of thinking, suggests a reversal of that scenario: The construction of a massive temple by a group of foragers is evidence that organized religion could have come before the rise of agriculture and other aspects of civilization. It suggests that the human impulse to gather for sacred rituals arose as humans shifted from seeing themselves as part of the natural world to seeking mastery over it. When foragers began settling down in villages, they unavoidably created a divide between the human realm—a fixed huddle of homes with hundreds of inhabitants—and the dangerous land beyond the campfire, populated by lethal beasts.
Interesting.

Friday, July 22, 2011

Wow! Science - with all these theories explaining all the mass extinction event, it is hard to conclude anything other than that the Universe is trying to kill us.

A new theory for the Permian extinction - massive release of methane from the oceans may have killed half of all life on earth:

Researchers at the Nordic Center for Earth Evolution at the University of Copenhagen claim to have discovered the cause of the extinction of over half the Earth's marine life 200 million years ago, reports Fox News. The cause, it seems, was a giant "Earth burp."


That is, a huge quantity of methane being released into the atmosphere.

The methane release likely originated from the sea floor, according to the study, and added a huge amount of carbon to the atmosphere, killing many species. LiveScience reports that the find suggests this event killed a number of species, paving the way for the rise of the dinosaurs.

The gas was releases over a period of 600,000 years, according to the report.

Scientists came to this conclusion by analyzing the chemical content of plant leaves preserved in the sediment at the bottom of the Tethys Ocean. By studying the different carbon isotopes in the sediment, scientists were able to draw these conclusions, reports LiveScience.

The researchers found a peak in favor of the lighter isotope, carbon 12, for a stint lasting about 20,000 to 40,000 years.

A strong shift in the ratio indicated that methane, not carbon dioxide, was responsible, Ruhl said.
Here is the Wiki article on the Permian-Triassic Extinction Event.

Saturday, July 16, 2011

Wow! Science - Haboob over Phoenix.

Video of 50 mile wide dust storm that engulfed Phoenix on July 5, 2011.



Driving through the Haboob:



Haboob in perspective:


Thursday, July 07, 2011

More Wow! Science.

Giant Storks may have preyed on "hobbit" humans.  

The fossil remains of what may have been a hobbit-like species of human were discovered in 2003 at the Liang Bua cave on the Indonesian island of Flores. In that cave, scientists also unearthed a large number of bird fossils — including 20,000- to 50,000-year-old wing and leg bones from what appears to have been a stork nearly 6 feet tall (1.8 meters).


"From the size of its bones, we initially were expecting a giant raptor, which are commonly found on islands, not a stork," said Hanneke Meijer, a vertebrate paleontologist at the Smithsonian Institution in Washington.
Weird.
Wow! Science.


Ok, I'm not sure if "terrorized" is the right word.  It is a wombat, after all.

But, still, it is the biggest marsupial known to science!
 
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