How Many Mass Extinctions Have There Been? [VIDEO]

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The commonly taught rule is that there have been the “Big Five” extinctions on Earth. But is that true?

The answer is a little more complicated than you would hope for but the folks over at MinuteEarth managed to put together this simple video to provide an easy-to-understand answer.

This movement to take complicated scientific ideas and create simplified videos focused on a small amount of information is bringing a revolution in how advanced concepts are taught. Enjoy.