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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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2004-12-01 08:31:27

The devastating cycles of plant and animal extinctions have spawned different schools of thought: Did the earth or the heavens bring catastropher? Astrobiology Magazine -- Two hundred and fifty million years ago, ninety percent of marine species disappeared and life on land suffered greatly during the world's largest mass extinction. The cause of this great dying has baffled scientists for decades, and recent speculations invoke asteroid impacts as a kill mechanism. Yet a new study published...


Word of the Day
malpais
  • The ragged surface of a lava-flow.
'Malpais' translates from Spanish as 'bad land.'