This Guy is Crazy

Here's something hunter-gatherers DID NOT do:  50 marathons in 50 days in 50 states, as Dean Karnazes is attempting to do.  Get the details here. 

Though I admire that this guy is trying to push the limits of human performance, he is probably taking years off his life.  A few years back some guys ran 7 marathons in 7 days on 7 continents, which isn't a real good idea either.

I ran a marathon once, and can't imagine doing it again.  Just the training for a marathon sets you up for injury, much less the race itself.  There are many better tests for fitness than a marathon.