In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
A person can live without food for about a month, but only about a week without water.
156
It takes about 20 seconds for a red blood cell to circle the whole body.
102
The world's shortest man measures only 21.5 inches.
73
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
If your DNA was stretched out it would reach to the moon 6,000 times.
256
We forget why we have entered a room because passing through doors creates an ‘event boundary’ causing the brain to file away what we were just thinking about.
26