13.) an average person will laugh 15 times a day
14.) a ducks quack doesn't echo and nobody knows why
15.) having blue eyes is actually a mutation. Before the mutation occurred, all humans had brown eyes
16.) there is a city called Rome in every continent
17.) owls are the only birds that can see the color blue
18.) babies are born without kneecaps
FEEL SMARTER?!?!?!