There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
Your fingernails grow faster in summer.
744
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
Our brains have a negativity bias and will remember bad memories more than good ones.
15
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
You can't tickle yourself.
29
Obsessive nose picking is called Rhinotillexomania.
101