Babies crawl an average of 200m a day.
212
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
The human brain doesn't stop developing until about 25 years old.
102
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29
By weight, Bone is five times stronger than steel.
417
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
Early American humans hunted car-size armadillos and used their shells for houses.
12