By Richard Evans The thing about the human body is that it breaks. At no point in human evolution has the human being ever been particularly durable. One single step, a mistake the size of a centimeter, and then a person can completely shatter all the bones in their leg and never be able to walk right again. In essence, it is one giant evolutionary joke. Humankind gets a ton of brainpower, but the durability of their body goes from a scale of being made of sugar glass to being hard as a rock, and...