For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
Mushrooms are more closely related to humans than they are to plants.
47
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
The human brain doesn't stop developing until about 25 years old.
102
The average person's skin weighs twice as much as their brain.
131
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
In one day, adult lungs move about 10,000 litres of air.
11
A human being loses an average of 40 to 100 strands of hair a day.
133