AGE: 21
OCCUPATION: Paralympic runner, would-be Olympic runner
NUMBER OF TIME COVERS: 0
PREVIOUS APPEARANCES ON THE TIME 100: 0
PRO: Born without key bones in his lower legs, the South African Pistorius endured the amputation of both legs at the knee. Now he uses carbon-fiber prosthetics to achieve a super-efficient stride that "able-bodied" runners can only dream of.
CON: Which is exactly why officials ruled in January that Pistorius shouldn't be allowed to run in Olympic track events: they say his prosthetics make him more than able-bodied.