If your time machine took you to the Archeon Eon, what would you likely see?

The Archean Eon spans from 4 billion years ago to 2.5 billion years ago. At that time the atmosphere was very different - full of toxic gases that would kill much of today's life. Also, the oldest known fossils date to this time.

Asked by Todd Curtis · Last updated 5 months ago · 1M views · SOURCE