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
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
The average person's skin weighs twice as much as their brain.
131
We share 70% of our DNA with a slug.
218
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
94
A person can live without food for about a month, but only about a week without water.
156