Originally posted by zatara
Unless intelligent beings are tinkering with DNA I believe that the seed of life is the same throughout the universe. The implications will be that chances are humans will pretty much look like humans. Ofcourse there is evolution by radiation and environment but the effects will not be much different than here on earth.
The conditions for organic-life must be within certain limits if it wants to flourish....if not, it will die.edit on 18/4/2012 by zatara because: (no reason given)
Don't forget evolution is based on chance. When a mutation in the DNA occurs, it is either harmful, beneficial, or neutral. Organisations with a harmful mutation generally will not survive to reproduce, and organisms with a beneficial mutation will generally do well and produce more offspring, so the mutation spreads. This is how evolution works, so different mutations have a different outcome. This means something completely alien to this planet may not look anything like us, even if at some point we shared common ancestors (be it a single or multi celled organism). Other planets also have different conditions, so what may be considered beneficial here on earth may in fact be harmful elsewhere.
Humans, in my opinion, have a bad design. We are very physically vulnerable. Our brains have evolved enormously but we seem to be a bit behind everywhere else. I'm not going to argue with mother nature though, evolution is an extraordinary process and we're how we are for a reason.
edit on 11/27/10 by SpearMint because: (no reason given)