apes or no apes

ok this is gonna sound silly to most of you who reply here probably. but i was talking to someone at one point who had told me that humans didn't actually evolve from cro-magnon man. he drew i simple little timeline showing cro-magnon man's time periods and drew another line under it that started towards the very end of cro-man's line.
cro-magnun ----------------
human -------------->
it was similar to that...the point is that he said that there was a time when we both were around...but that humans didn't evolve here, we just appeared at a certain time, and soon after cro-magnun man became extinct...as if perhaps we were dispatched here from some 'other' place. can someone verify if this can possibly have any pinch of truth in it. i'm very much into the possibilities of extraterrestrial life...never thought about us being the aliens before.

Thread copied to the apes or no apes thread in the Human Origins forum, this copy of the thread has been closed.