Today’s interesting fact has to do with muscles and chimpanzees.

The average chimp's muscles are twice as strong as a human's muscles.

The reduction in strength is thought to have allowed us humans to increase our dexterity, and therefore produce the flints, wood work and eventually societies we now have in the modern world.

So the loss of strength is not necessarily a bad thing, if you want to write or use a keyboard as a ten finger typist.