Life before and after "snowball Earth"

[tzimie]

The question is simple, was life able to recover from the very long and cold "snowball earth" epoque, which means that Earth was not completely sterile during that period, or, when climate became warmer, life simply reborn again - from scratch?

 

[Vanadium 50]

http://en.wikipedia.org/wiki/Snowball_Earth has a whole section titled Survival of life through frozen periods.