Originally posted by Stealth
but that's the thing... DO they. Darwin later disputed his own theory, and didn't Einstein (arguably the most genius man of the millenium) dispute evolution? (<-- note that may not be correct. i remember reading about it)
Darwin never disputed the fundemental theory of evolution. He just got tangled up trying to explain heredity without any knowledge of genetics.
As for Einstein, boy have you made a bad choice to make an example of

. Einstein wasted the last 20 years of his life trying to disprove his own theory of relativity (hence the famous "God does not play dice with the universe quote creationists are so fond of").
Science isn't based on personalities. Just cause Einstein said quantum physics was wrong doesn't make him right even. Not even if he invented the bloody thing

When Einstein said he'd got it wrong every single phyisist said "prove it" and went off and through away 20 years trying to do so. Meanwhile they found more proof every day that he was right.
So even if you dug up Darwin, reanimated him and got him to say that he was wrong it wouldn't matter one iota.
On top of that Einstein was knowledgable about physics not biology AFAIK. His views on evolution aren't really that important unless you can show that he had studied the natural sciences heavily (And maybe not even then considering the way he acted unscientifically in trying to refute quantum physics). It's sort as if a professor of phyiscs is telling you that the fan belt on your car is broken and a mechanic is telling you it's the spark plugs. Who would you believe?
Originally posted by Stealth
but how do you KNOW it began here? how do you know there isn't another planet in another galaxy somewhere that's had life since before earth?
A theory called Panspermia states that. It's not widely credited because it still suffers from the fact that even if life did come from elsewhere you need to explain how it arose there and travelled here.