Spirit Gets Stuck, and Discovers!

http://science.nasa.gov/headlines/y2009/02dec_troy.htm?list46156
Author: Dauna Coulter | Editor: Dr. Tony Phillips | Credit: Science@NASA

This article was about the Mars rover Spirit roaming in a area named after a the Grecian city of Troy. Spirit got stuck and by trying to get out found sulfates which indicate that steam was once present o Mars. They even found evidence that suggests that it snowed on Mars.

I chose this article mainly because its very interesting to see all the little things that we find that are on day going to turn into a huge epiphany for astronomers and even society everywhere. Every time something is found we are one step closer to reaching something big. Also we continue to find things that suggest that we aren't alone, or was once not alone, which is very exciting. Its almost like seeing evolution happen with your own eyes.

My Question: In the article it mentions that sulfates suggests that steam once existed, which suggests that life could have formed. What type of life could have formed, as far as structure?