News tagged with mass extinction

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New Blow for Dinosaur-Killing Asteroid Theory

( -- 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 ...

dateApr 27, 2009 in Earth Sciences
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Has the Earth's sixth mass extinction already arrived?

With the steep decline in populations of many animal species, from frogs and fish to tigers, some scientists have warned that Earth is on the brink of a mass extinction like those that occurred only five times before during ...

dateMar 02, 2011 in Ecology
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