Here is what some of the earliest life on Earth looked like

NewScientist is offering free wallpaper.

One of the pictures is absolutely spectacular. Living stromatolites! I had no idea they were red!

This is what life looked like on Earth for the first few billion years.

http://www.newscientist.com/data/images/ns/screensaver/2007/wallpaper/NewScientist_november_large.jpg

http://en.wikipedia.org/wiki/Stromatolites