Athlete, actor and activist Aimee Mullins talks about her prosthetic legs — she’s got a dozen amazing pairs — and the super-powers they grant her: speed, beauty, an extra 6 inches of height … Quite simply, she redefines what the body can be. TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world’s leading thinkers and doers give the talk of their lives in 18 minutes.