In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
The human brain is more active during sleep than during the day.
28
The human brain has the capacity to store everything that you experience.
4k
Only humans shed emotional tears.
331
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
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