The average person's skin weighs twice as much as their brain.
131
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Your thumb is about the same size as your nose.
124
The human brain is more active during sleep than during the day.
28
Early American humans hunted car-size armadillos and used their shells for houses.
12
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
We forget why we have entered a room because passing through doors creates an ‘event boundary’ causing the brain to file away what we were just thinking about.
26
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69