We’ve all done a double take when mistaking a random person on the street for someone we know or know of, like the celebrity look-alikes Will Ferrell and Chad Smith — the actor and the Red Hot Chili Peppers’ drummer, respectively.
But does everyone have a doppelganger? There’s a fairly decent chance of it, actually, thanks to the limited number of genes that influence facial features.
Dispatches From The Front 