It takes about 20 seconds for a red blood cell to circle the whole body.
102
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
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
31
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29
Your heart will pump about 212 million liters in its lifetime.
26
Yawns are more contagious among people with closer relationships.
163