Maxed out: Testing humans to destruction
We have an irrepressible urge to push our boundaries and set records. How much further can we go, physically and mentally, before we reach our ultimate limits? What’s the human speed limit? How long can we concentrate for? How long could you survive a vacuum? How much can we remember? How cold can you get and live? How long could you survive without food or drink? How long can you go without sleep? How many gs can you pull? How high can you go? How much can a human lift? How much radiation can we take? How long could you hold your breath?