The human sigh acts as a physiological reset button.
23
Your fingernails grow faster in summer.
744
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
It is possible for you to survive even after the removal of the spleen, the stomach, one kidney, one lung, 75% of the liver, 80% of the intestines, and almost every organ from the pelvic and groin area.
218
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
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