Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Every human spent about half an hour as a single cell.
144
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
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
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29