A man's beard grows fastest when he anticipates sex.
239
Only humans shed emotional tears.
331
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
There are about 255 babies born worldwide every minute.
46
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
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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