Your fingernails grow faster in summer.
744
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
-137
A man's beard grows fastest when he anticipates sex.
239
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
The largest cell in the human body is the female egg and the smallest is the male sperm.
682