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 youd 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