"Humans: have stomach acid that is 20 times weaker than that of a meat-eater" No, the stomach acid of a dog is only 5X that of the humans. Also, some monkeys are cannibals, yet they have no claws. Squirrel has claws but is herbivore. Skunk has claws but is not meat eater either. Shark eats meat but has no claws. My girlfriend has no claws but eats me. Other exceptions, as there always are. But thanks for sharing, a lot of it is true.