The 5 Worst Mass Extinctions in History

Описание к видео The 5 Worst Mass Extinctions in History

In this unsettling episode of SciShow, Hank takes us on a trip through time to revisit the 5 major mass extinction events that have impacted species over the Earth's history. You'll be sure to leave this episode with some thoughts about what could possibly be the sixth event—the one caused by human activities. Let's go!

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References for this episode can be found in the Google document here: http://bit.ly/KOHsM5

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