Please correct me where I'm wrong :wink:
I heard that all molecules of living organisms (or all molecules of a certain type?) are left-handed on earth, and that this probably came about by coincidence (it could've been right-handed as well). What I wonder is: would life have been different if by chance the molecules of living organisms had been right-handed rather than left-handed? Or is that like asking "would life have been different if organisms evolved to breath helium rather than oxygen?", with the obvious answer "there'd be no life" ? :wink: