[kach22i]

Originally Posted by RWebb

we should go to Mars and drill into some rocks

Rover finds grey rock beneath Red Planet's surface

Read more: Rover finds grey rock beneath Red Planet's surface

So much for Mars being "The Red Planet".
NASA said that its Curiosity rover has scooped up a sample from the interior of a Martian rock and found that the powdery soil just beneath the planet's rust-coloured exterior is actually a light grey colour.
"Something that the science team is really excited about, is the fact that the tailings from our drill operation aren't the typical rusty orange-red that we associate with just about everything on Mars," said Joel Hurowitz, sampling system scientist for Curiosity.
"When things turn orange, it's because there's a rusting process of some kind going on that oxidises the iron in the rock," he said during a press conference at NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California.

Seaweed Aliens Invade Earth Inside Sri Lankan Meteorite, Scientist Claims
http://www.ibtimes.co.uk/articles/427033/20130123/aliens-exist-seaweed-algae-inside-meteorite-fossil.htm

"Since this meteorite is considered to be an extinct cometary fragment, the idea of microbial life carried within comets and the theory of cometary panspermia is thus vindicated.

I think finding fossils and actual life are two different things, but it is very interesting.

http://m.technologyreview.com/view/512381/astrobiologists-find-ancient-fossils-in-fireball-fragments/