Recent Posts by Pangaea Biosciences

Convergent evolution: New fins evolve repeatedly in teleost fishes

Though present in more than 6,000 living species of fish, the adipose fin, a small appendage that lies between the dorsal fin and tail, has no clear function and is thought to be vestigial. However, a new study analyzing their origins finds that these fins arose repeatedly and independently in multiple species. In addition, adipose…
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30,000 year-old giant virus found in Siberia

A new type of giant virus called "Pithovirus" has been discovered in the frozen ground of extreme north-eastern Siberia by researchers from the Information Génomique et Structurale laboratory (CNRS/AMU), in association with teams from the Biologie à Grande Echelle laboratory (CEA/INSERM/Université Joseph Fourier), Génoscope (CEA/CNRS) and the Russian Academy of Sciences. Buried underground, this giant…
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When Trilobites Ruled the World

 Trilobites may be the archetypal fossils, symbols of an archaic world long swept beneath the ruthless road grader of time. But we should all look so jaunty after half a billion years. At the Smithsonian’s National Museum of Natural History, Brian T. Huber, chairman of paleobiology, points to a flawless specimen of Walliserops, a five-inch trilobite that swam the Devonian…
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‘Tunnels’ and ‘spheres’ in meteorite revive debate over life on Mars

The discovery of tiny carbon-rich balls and tunnels inside a Martian meteorite has once again raised the possibility that the Red Planet was teeming with primitive life millions of years ago. The meteorite, which fell to Earth during the Stone Age, contains microscopic burrows and spheres that resemble the marks microorganisms leave when they eat…
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Competition breeds new fish species, study finds

Competition may play an important role during the evolution of new species, but empirical evidence for this is scarce, despite being implicit in Charles Darwin's work and support from theoretical studies. Dr Martin Genner from Bristol's School of Biological Sciences and colleagues used population genetics and experimental evidence to demonstrate a role for competition that…
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A Hunk Of Planet Dissolves Before Our Eyes

It begins with a growl. Then there's a crack — a slurpy, sucky, crunchy noise. A guy is on the phone, and his pal interrupts him and says, "It's starting, Adam, I think. Adam? It's starting ..." The two are up on a bluff, overlooking a giant ice field. They are standing next to time-lapse…
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Prehistoric Boy May Be Native American ‘Missing Link’

A prehistoric boy's DNA now suggests that ancient toolmakers long thought of as the first Americans may serve as a kind of "missing link" between Native Americans and the rest of the world, researchers say. The findings reveal these prehistoric toolmakers are the direct ancestors of many contemporary Native Americans, and are closely related to all…
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