6 months ago
Last edited at 6:25AM on 6/28/2013
There could have been life on Mars in the past. Or as YouthGoneWild pointed out, life could possibly be frozen within the crust, given that Mars once had water on its surface and in the crust. Unfortunately, Mars' weak core, rotational speed, and weak magnetic field prevented the water from thriving on the surface, which is why it evaporated once it reached the surface, giving the planet a desert-like appearance.
There's possibly bacterial life on Saturn's moon Titan and Jupiter's moon Europa. Both moons could provide the right conditions for discovering life in the smallest form: Titan's methane-rich atmosphere and Europa's icy surface and crust. It hasn't been proven, yet.
Quite possibly "frozen in time" under the layers of dust. Some bacterium CAN be brought back to life even after frozen for a long time. Mars didnt have enough time to develop into a thriving ecosystem before the atmosphere decayed away.
I believe so, but I wouldn't be surprised if there wasn't. There could be something under Mar's polar caps, which could contain water under the ice. We haven't explored enough of the red planet to develop and actual serious opinion yet.
No, I do not. It's certainly possible, though, that basic life forms exist under the planet's surface.
It's fairly clear that Mars used to have liquid water on its surface and an atmosphere much more like our own. One theory of the origins of life on Earth is that it actually originated on Mars. Mars could have supported life long before the Earth could have, as it would have cooled much quicker. Life on Mars could then have hitched a ride to earth in debris from an asteroid collision during the late heavy bombardment.