"F. Kuik" wrote in message
...
Eric The whole time humans are on Mars they will be in their space
ship,or in their space suits. Their bodies will never touch Mars. They
will be kept warm(68F) Shielded from harmful radiation,and won't stay
long.

If technology gets better they can stay longer and longer. It's also true
that the human body does change alot in space. Bone structure for example.
So what happends is really to find out yet.


Yeah, but those changes are not inheritable. For there to be changes in
future generations, there must be some form of natural selection. Further,
they must be adaptations which are of benefit prior to child bearing age.

Bone structure is possible but unlikely. Its hard to see how living in a
lower G environment could cause some people to be less fit for
reproduction - a higher G environment would be a different argument
entirely. One possibility is radiation tolerance - I don't know how well we
could shield Martian inhabitants against radiation; it may be that some
natural tolerance to radiation would be of evolutionary benefit on Mars and
would cause some divergence from terrestrial humans.

Its taken 50,000 years for different races on earth to evolve, and we are
still quite obviously a single species. I suspect future life on Mars would
differ from future life on earth by less than (say) the life of an Eskimo
10,000 years ago differs from the life of an Australian Aborigine 10,000
years ago, so the pressure causing evolotionary divergence would be less.