Yawns are more contagious among people with closer relationships.
163
The human sigh acts as a physiological reset button.
23
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23
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
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
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