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The science behind extinction

The science behind extinction

An estimated 8 million animal and plant species live on planet Earth. But extinction rates are accelerating. Gorillas, gazelles, frogs, rhinos and whales are among the species now critically endangered, and human activities present the biggest threat. In mass extinctions, a huge portion of the planet’s species dies off over thousands or even millions of years – a geological blink. Scientists have...

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Chicxulub Earth NASA Stanford