It takes about 20 seconds for a red blood cell to circle the whole body.
102
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
In one day, adult lungs move about 10,000 litres of air.
11
The human brain has the capacity to store everything that you experience.
4k
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
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
30
The human brain is more active during sleep than during the day.
28
Obsessive nose picking is called Rhinotillexomania.
101