... WASHINGTON -- New evidence shows that an extinction event in which more than half of all ... of an impact from outer space. The extinction, at the boundary of the Triassic and ... is similar in its suddenness to two extinction events that have been linked to space ...

WASHINGTON --The most extensive extinction event in history, the die-off of ... Earth experienced its most extensive extinction crisis -- a die-off that killed at ... creatures. Called the Permian-Triassic extinction, it is a key event in the planet ...

... are no more vulnerable to extinction than their continental counterparts ... higher proportion of species extinctions have occurred on islands ... vulnerable to the threat of extinction. But University of Arkansas ... efforts by showing where extinctions may occur first. ...

... has suggested that disease caused the extinctions, a view he acknowledges is "out in ... predation may have combined to cause the extinctions. Reporting in the journal Nature last ... authors reviewed the evidence for Ice Age extinctions around the world, concluding that ...

... time, in Johannesburg -- delegates admit that little, if any, headway has been made to prevent global warming, species extinctions and other environmental problems. For nearly two weeks, starting Monday, 65,000 delegates will convene in venues throughout ...

... transformation of American life. Businesses that shaped their communities for generations banks, newspapers, others risk extinction. GM and Chrysler, once symbols of America's industrial might, filed for bankruptcy. And as part of their get-small ...

... mammals had succumbed. But a variety of competing theories besides outright butchery have been formed to explain the mass extinctions, from climate and habitat change associated with the end of the last ice age to the spread of new diseases by animals that ...

... explain the massive extinctions deep underwater ... record's reported extinction of marine life, as ... species after massive extinctions. Examination of the ... correlation between the extinction pattern of a species ... great survivors of mass extinctions. ...

... biggest.'' Earth may have had such powerhouse volcanoes long ago, which could have had effects on climate change and animal extinctions, McEwen said Wednesday. The deposit lies at the edge of the volcanic crater Pillan Patera, named after a South American ...

... was modeled is among 66 types of old-fashioned chickens the American Livestock Breeds Conservancy is trying to save from extinction as factory-raised cross varieties command 90 percent of the market. "When we can identify something in danger, we need ...