That Time Oxygen Almost Killed Everything

What if we told you that there was a time when oxygen almost wiped out all life on Earth? 3 billion years ago, when the world was a place you’d never recognize, too much of a good thing almost ruined everything for everybody. This episode on the Oxygen Catastrophe is supported by Squarespace. If you visit and use offer code “eons“, you’ll get 10% off your first purchase. Produced in collaboration with PBS Digital Studios: Want to follow Eons elsewhere