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Air & Space Magazine
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AIR&SPACE magazine is a general interest magazine for aviation and space flight enthusiasts. It reflects its affiliation with the Smithsonian Institution's National Air and Space Museum by encompassing every era of aviation and space exploration and publi...
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By Bruce ...
By Bruce Lieberman
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DenverPost.com - NATION/WORLD
The extinction "could have been a one-two punch," said Bruce Lieberman, a paleontologist at the University of Kansas and a co-author of the theory."Our theory builds on earlier theories" that included an ice age, he said.
The fossils were found by a ...
The fossils were found by a team headed by Bruce Lieberman, senior curator of invertebrate paleontology at the University of Kansas.His group's report on the discovery appears in the current issue of PLoS One, an international online scientific journal published by the Public Library of Science in San Francisco.
According to Lieberman
, the ones his
group found must have sunk onto the soft sand on the bed of a shallow sea and then lay there as tiny particles of extremely fine sand buried them to preserve their delicate imprints.
"The fossil record is biased against soft-bodied life forms such as jellyfish because they leave little behind when they die," Lieberman
And the fact that those jellies were so complex, and apparently so successful that their counterparts exist today, means that they either evolved very rapidly by 500 million years ago, or that the group is even older and had evolved even longer ago, he
team said their fossils are "exquisitely preserved" but they were careful not to claim that they belong to the exact same orders or classes as their modern look-alikes.
Kansan.com - Research denies theory
Bruce Lieberman, associate professor of geology at the University of Kansas, studies these ancient organisms called trilobites.He
has found that animal life began earlier than most people think.
...Lieberman, along with Joe Meert, an assistant professor of geology at the University of Florida, found that animal life existed at least 50 million years before the Cambrian Explosion, the break up of the supercontinent, Pangea, that assisted in rapid animal evolution.
research focuses on the animals, while Meert focuses on the magnetic properties of rocks.
"Probably the earliest trilobites originated in Siberia," Lieberman
The world's continents move at a normal rate of 5 centimeters a year, Lieberman
At that time, the continents were moving at a slightly faster rate, but not so much as several feet a year.This is an idea that the current research disagrees with.
Meert and Lieberman
wrote a paper together that covers their research, which was published in the London Journal of Geological Society
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