Just read that Scientists have discovered fossilized Diatoms within a meteor which landed in Sri Lanka late last year... Hasn't been picked up by any of the major news sites yet, but might be interesting to watch the story progress...
http://www.lankaweb.com/news/items/2...-in-500-years/
http://www.buckingham.ac.uk/wp-conte...-meteorite.pdf
Davin