Crazy Mass Extinctions
Share the knowledge!
Key Facts In This Video
Over 99% of all the animal species that have ever lived are now extinct. 00:00
Plants were the cause of the mass extinction that occurred about 374 million years ago. 00:57
Carbon dioxide levels have climbed at least 25% over the last 50 years. 03:07
Wake up with the smartest email in your inbox.
Our best articles a few times a week.