15 Jun '10 04:04>
http://www.sciencedaily.com/releases/2010/06/100613181245.htm
A large ocean 1/3 the surface area of Mars existed about 3 billion years ago, I guess about the time life was getting good and started on Earth. My question would be how long it remained a large ocean and if the conditions were ripe for life on Earth and Mars.
How advanced could life have evolved on Mars, given a large ocean which by definition implies a surface temperature above freezing and with enough surface air pressure to allow liquid water without evaporation for long periods of time, the question being, a few million years?
100 million years? A lot can happen evolution wise in that much time so there might be fossil organisms found a lot higher on the food chain than just microbes which is the present conservative take by the scientific community.
If life were to be found there at all, fossil life that is, it would according to present thought, only be microbes. But if a large ocean was present for hundreds of millions of years there may be actual multicellular fossils as well, maybe like Earth life 500 million years ago.
It would be incredible if some future Mars manned expedition found life of ANY kind underground, just for the analysis of what it would have in the way of DNA or whatever the analogue would have been on Mars, presumably given an independent evolution of life there.
If they found something like our style of DNA, that would be a large hint that Panspermia theories were right! All speculation now of course.
A large ocean 1/3 the surface area of Mars existed about 3 billion years ago, I guess about the time life was getting good and started on Earth. My question would be how long it remained a large ocean and if the conditions were ripe for life on Earth and Mars.
How advanced could life have evolved on Mars, given a large ocean which by definition implies a surface temperature above freezing and with enough surface air pressure to allow liquid water without evaporation for long periods of time, the question being, a few million years?
100 million years? A lot can happen evolution wise in that much time so there might be fossil organisms found a lot higher on the food chain than just microbes which is the present conservative take by the scientific community.
If life were to be found there at all, fossil life that is, it would according to present thought, only be microbes. But if a large ocean was present for hundreds of millions of years there may be actual multicellular fossils as well, maybe like Earth life 500 million years ago.
It would be incredible if some future Mars manned expedition found life of ANY kind underground, just for the analysis of what it would have in the way of DNA or whatever the analogue would have been on Mars, presumably given an independent evolution of life there.
If they found something like our style of DNA, that would be a large hint that Panspermia theories were right! All speculation now of course.