http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. A University of Florida researcher has co-authored a study tracing the evolution of the modern opossum back to the extinction of the dinosaurs and finding evidence to support North America as the center of origin for all living marsupials. http://www.physorg.com/news180161821.html Other Sciences Wed, 16 Dec 2009 04:58:16 EST news180161821 Extinct woolly mammoths and ancient American horses may have been grazing the North American steppe for several thousand years longer than previously thought. After plucking ancient DNA from frozen soil in central Alaska, a team of researchers used cutting-edge techniques to uncover "genetic fossils" of both species locked in permafrost samples dated to between 7,600 and 10,500 calendar years. This new evidence suggests that at least one population of these now-extinct mammals endured longer in the continental interior, challenging the conventional view that these and other large species, or megafauna, disappeared from the Americas about 12,000 years ago. http://www.physorg.com/news180095166.html Biology Tue, 15 Dec 2009 11:20:01 EST news180095166 The asteroid impact that many researchers claim was the cause of the dinosaur die-off was bad news for marine life at the time as well. But new research shows that microalgae - one of the primary producers in the ocean - bounced back from the global extinction in about 100 years or less. http://www.physorg.com/news173713660.html Space & Earth Fri, 02 Oct 2009 15:10:01 EST news173713660 Microscopic analysis of scratches on dinosaur teeth has helped scientists unravel an ancient riddle of what a major group of dinosaurs ate- and exactly how they did it! http://www.physorg.com/news165515308.html Other Sciences Mon, 29 Jun 2009 17:28:50 EST news165515308 (PhysOrg.com) -- Were major extinction events real biological catastrophes or were they merely the result of gaps in the fossil record? Research by a team of geologists from the Universities of Bristol, Plymouth, and Saratov State in Russia, has shed new light on a debate that has divided scientists of late and was recognised as far back as Darwin`s Origin of Species. http://www.physorg.com/news160663448.html Space & Earth Mon, 04 May 2009 13:44:41 EST news160663448 Dinosaurs were dying out much earlier than the mass extinction event 65 million years ago, Natural History Museum scientists report in the Proceedings of the Royal Society journal today. http://www.physorg.com/news160324445.html Other Sciences Thu, 30 Apr 2009 15:34:45 EST news160324445 The Lost World, Sir Arthur Conan Doyle's account of an isolated community of dinosaurs that survived the catastrophic extinction event 65 million years ago, has no less appeal now than it did when it was written a century ago. Various Hollywood versions have tried to recreate the lost world of dinosaurs, but today the fiction seems just a little closer to reality. http://www.physorg.com/news160129994.html Other Sciences Tue, 28 Apr 2009 09:34:00 EST news160129994 (PhysOrg.com) -- The enduringly popular theory that the Chicxulub crater holds the clue to the demise of the dinosaurs, along with some 65 percent of all species 65 million years ago, is challenged in a paper to be published in the Journal of the Geological Society on April 27, 2009. http://www.physorg.com/news160028871.html Space & Earth Mon, 27 Apr 2009 05:28:29 EST news160028871 (PhysOrg.com) -- New scientific findings by geologist Robert Gastaldo of Colby College in Waterville, Maine, and colleagues call into question popular theories about the largest mass extinction in Earth's history. http://www.physorg.com/news155238422.html Space & Earth Mon, 02 Mar 2009 17:47:36 EST news155238422 The shorelines of ancient Alberta, British Columbia and the Canadian Arctic were an important refuge for some of the world's earliest animals, most of which were wiped out by a mysterious global extinction event some 252 million years ago. http://www.physorg.com/news142069249.html Space & Earth Wed, 01 Oct 2008 08:40:49 EST news142069249