Mass Extinction

This video highlights a team of scientists who work on reconstructing the mass extinction that occurred 250 million years ago, the end of the Permian Period. This event wiped out the majority of life on our planet, resetting the evolution of life. Clues suggest that deadly bacteria might have set off a chemical chain reaction that poisoned the Permian seas and atmosphere.

Go To:

NOVA scienceNOW
PBS Online

Notes From Our Reviewers

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Teaching Tips

Teaching Tips

In an evolution unit, use of this video will allow students to make the connection between climate change and species extinction.

Educator should soften the threat of another mass extinction in our lifetime that is hinted at in the end of the video. Instead, solutions should be woven into the lesson.