If the human eye was a digital camera, it would have 576 megapixels.
25
Early American humans hunted car-size armadillos and used their shells for houses.
12
Mushrooms are more closely related to humans than they are to plants.
47
Your heart will pump about 212 million liters in its lifetime.
26
You can't tickle yourself.
29
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Your thumb is about the same size as your nose.
124
A human being loses an average of 40 to 100 strands of hair a day.
133