When the Archean began, the Earth's heat flow was nearly three times as high as it is today, and it was still twice the current level at the transition from the Archean to the Proterozoic (2,500 ).

Evolution The origin of life on Earth is not well understood, but it is known to have occurred at least 3.5 billion years ago, during the hadean or archean eons on a primordial Earth that had a substantially different environment than is found at present.

We left off in the last video in the Archean eon, where Arche comes from ancient Greek, meaning beginning or origin, and it's the eon in which either life first starts to exist, or at least it's first starts to somewhat flourish, it's possible that maybe life starts to exist at the end of the Hadean eon and of course, this boundary is big.