Superpowers that really exist

Nice post on BoingBoing about real superpowers, in the sense of abilities that exist in nature in some animals.  But the best one is a real mutation that has occurred in humans:

 There have been at least two documented cases of a mutation in humans that triggers accelerated muscle growth and extraordinary strength right from birth; it happens when both copies of a myostatin-producing gene are defective, is extremely rare, and no one knows what the long term health consequences are. Having said that…the child in whom the mutation was first identified could, at age four, hold two 6.6 lb weights with his arms extended. That’s the equivalent of 3 litres of water. In each hand.

Full story:
http://boingboing.net/2014/04/30/6-superpowers-that-really-exis.html?utm_campaign=moreatbbmetadata&utm_medium=referral&utm_source=boingboing.net