Editing Prehistory (section)

=== Proterozoic Period===
*'''2.5 billion to 540 million years ago'''
At this point, some single cell develops a capacity to use sunlight to make sugar from carbon dioxide and water. This gives them an edge over those cells which just float around for whatever bit of odd chemical energy they can scrounge up and they fill the seas with these Cyanobacteria. They change the atmosphere, filling it with oxygen and eventually cause a massive ice age that nearly wipes out life on Earth before it could really get started. This was a set back, but life slowly continued to refine itself in this period. Things such as sex evolves at this time as well as the first multicellular life emerges. Though these are simple things such as slime-molds and sponges.

====Ediarcaran Period====
*'''638 to 540 million years ago'''
Earth gradually gets more hospitable to life and basic multicellular life more complicated than a sponge begins to emerge bit by bit. Still fairly simple at this point, but they are there. Also includes some early molluscs.