Poor eyesight (myopia) is associated with higher IQ.
232
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
It takes approximately 12 hours for food to entirely digest.
93
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13