science

Yes, to an extent they do different things, but that's not what the person you were replying to was talking about. For several years there was this idea that "left-handed people are right-brain dominant, and right-handed people are left-brain dominant." And along with that went this whole astrology-tinged thing about the right brain being the creative half and the left brain being the analytic half and whatnot. It's pretty much nonsense.