A person can live without food for about a month, but only about a week without water.
156
A man's beard grows fastest when he anticipates sex.
239
It takes about 20 seconds for a red blood cell to circle the whole body.
102
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
Tigers can see 6 times better at night than humans.
305
Your thumb is about the same size as your nose.
124
Only humans shed emotional tears.
331
Early American humans hunted car-size armadillos and used their shells for houses.
12