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Latest Phanerozoic Stories

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2008-01-23 13:30:00

AUSTIN, Texas -- The most detailed three-dimensional seismic images yet of the Chicxulub crater, a mostly submerged and buried impact crater on the Mexico coast, may modify a theory explaining the extinction of 70 percent of life on Earth 65 million years ago.The Chicxulub crater was formed when an asteroid struck on the coast of the Yucatan Peninsula. Most scientists agree the impact played a major role in the "KT Extinction Event" that caused the extinction of most life on Earth, including...

2007-11-11 03:00:18

By Lee, Seung-Bae Choi, Duck K ABSTRACT- The Pseudokoldinioidia Fauna is a newly documented uppermost Cambrian trilobite assemblage from the Dongjeom Formation of the Taebaek Group, Taebaeksan Basin, Korea. It is characterized by low species diversity comprising six trilobite taxa: Micragnostus chiushuensis, Koldinioidia typicalis, leiostegiid genus and species indeterminate, Pseudokoldinioidia perpetis, Onychopyge borealis, and pilekiid genus and species indeterminate. Of these, special...

4368585a88a43219aab25d44585e24091
2007-09-20 15:50:00

WASHINGTON -- Scientists, wringing their hands over the identity of the famed "hobbit" fossil, have found a new clue in the wrist. Since the discovery of the bones in Indonesia in 2003, researchers have wrangled over whether the find was an ancient human ancestor or simply a modern human suffering from a genetic disorder. Now, a study of the bones in the creature's left wrist lends weight to the human ancestor theory, according to a report in Friday's issue of the journal Science. The wrist...

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2007-09-10 17:42:15

The impactor believed to have wiped out the dinosaurs and other life forms on Earth some 65 million years ago has been traced back to a breakup event in the main asteroid belt. The finding provides insights into one of the most important extinction events in Earth's history. Known as the Cretaceous-Tertiary (K-T) extinction, this impact event signaled a dramatic change in the evolutionary history of Earth. Understanding the origins and effects of this event can not only teach us about the...

2007-08-14 06:16:40

By Prendergast, Kate Our prehistoric ancestors survived rapid climate change and rising temperatures as extreme as those we face today, says Kate Prendergast. What can they tell us about global warming? BETWEEN 18- 20,000 YEARS AGO, average temperatures in Europe probably fell to at least 10[degrees]C below the levels they are today. In the last great Ice Age, glaciers expanded rapidly and covered large areas of northern and central Europe in ice sheets. Much of Europe resembled tundra and...

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2006-11-28 13:35:00

Data supports the single-impact theory in a controversial discussion COLUMBIA, Mo. "“ The dinosaurs, along with the majority of all other animal species on Earth, went extinct approximately 65 million years ago. Some scientists have said that the impact of a large meteorite in the Yucatan Peninsula, in what is today Mexico, caused the mass extinction, while others argue that there must have been additional meteorite impacts or other stresses around the same time. A new study provides...

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2006-03-29 15:04:16

Boulder, Colo. - A new study of melted rock ejected far from the Yucatan's Chicxulub impact crater bolsters the idea that the famed impact was too early to have caused the mass extinction that killed the dinosaurs 65 million years ago. A careful geochemical fingerprinting of glass spherules found in multiple layers of sediments from northeast Mexico, Texas, Guatemala, Belize and Haiti all point back to Chicxulub as their source. But the analysis places the impact at about 300,000 years...

2005-12-21 22:24:15

By Michael Perry SYDNEY (Reuters) - Hundreds of human footprints dating back 20,000 years to the Ice Age have been discovered in a dry lake bed in Australia, scientists said on Thursday. University of Melbourne archaeologist Matthew Cupper told Australian radio they were the earliest footprint fossils found in the country. "It's really quite a remarkable find. It's a little snapshot in time. The possibilities are endless in terms of getting a window into past aboriginal society."...

2005-08-04 17:37:01

A Penn State researcher is part of the team that developed techniques that have generated insights into dietary divergences between some of our human ancestors, allowing scientists to better understand the evolutionary path that led to the modern-day diets that humans consume. "Our new techniques are allowing us to get beyond simple dichotomies and helping us understand the processes by which dietary evolution is working," said Peter Ungar, professor of anthropology at the University of...

2005-08-04 17:18:22

GAINESVILLE, Fla. "” Prehistoric big game hunters and not the last ice age are the likely culprits in the extinction of giant ground sloths and other North American great mammals such as mammoths, mastodons and saber-toothed tigers, says a University of Florida researcher.  Determining whether the first arrival of humans or the warm-up of the American continent at the end of the last Ice Age was responsible for the demise of prehistoric sloths has puzzled scientists because both...


Latest Phanerozoic Reference Libraries

Palaeovespa
2014-04-18 16:08:43

Palaeovespa is a genus of wasps that holds seven species, all of which are extinct. Two of the species were discovered in Baltic amber deposits from Europe dating back to the middle Eocene era, while the other five were found in Florissant Formation amber from the Priabonian stage era in Colorado in the United States. This genus, and four of its species, was first described in 1906 by Dr. Theodore Cockerell in the Bulletin of the Museum of Comparative Zoology. Cockerell described all but one...

Australopithecus africanus
2013-11-29 10:55:07

Australopithecus africanus was an early hominid, an australopithecine that lived between roughly 3.03 and 2.04 million years ago in the later Pliocene and early Pleistocene. Au. africanus was of slender build and was thought to have been a direct ancestor of modern humans. Fossil remains signify that Au. africanus was considerably more like modern humans that Au. afarensis, with a more human-like cranium permitting a larger brain and more humanoid facial features. This hominid has only been...

Thescelosaurus
2013-04-28 18:48:11

Thescelosaurus, meaning “godlike”, “wondrous”, or “marvelous” and “lizard” was a genus of small ornithopod dinosaur that appeared at the very end of the Late Cretaceous period in North America. It was a member of the last dinosaurian fauna before the Cretaceous-Paleogene extinction event around 65.5 million years ago. The completeness and preservation of many of its specimens illustrate that it might have preferred to live near streams. This bipedal ornithopod is known from...

Daspletosaurus
2013-04-28 18:27:18

Daspletosaurus, meaning “frightful lizard” is a genus of tyrannosaurid theropod dinosaur that resided in western North America between 77 and 74 million years ago, during the Late Cretaceous Period. Fossils of the only named species were found in Alberta, although other possible species from Alberta and Montana wait for description. Daspletosaurus is closely related to the much larger and more current Tyrannosaurus. Like most of the known tyrannosaurids, it was a multi-ton bipedal...

Deinonychus
2013-02-12 13:34:53

Deinonychus is a genus of carnivorous dromaeosaurid dinosaurs. There’s one described species, Deinonychus antirrhopus. These dinosaurs, which were capable of growing to be 11 ft long, lived during the early Cretaceous Period, around 115 to 108 million years ago. Fossils have been uncovered from the U.S states of Wyoming, Montana, and Oklahoma, in rocks of the Cloverly Formation and Antlers Formation, though teeth that might belong to Deinonychus have been found much farther east in...

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