Have you ever been to the circus and seen the super-bendy performers that can move their bodies in all sorts of amazing ways? You might be wondering, how did they get so flexible? We were wondering that too, so we asked Cami Biggar, a contortionist at Circus Juventas, to help us find the answer.

Got a question that’s a real brain bender? Send it to us at BrainsOn.org/contact, and we’ll help you wrap your head around it.