Only humans shed emotional tears.
331
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
In one day, adult lungs move about 10,000 litres of air.
11
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
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29
The average person will go on a date at least 100 times before they finally marry.
33
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11