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
It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
Yawns are more contagious among people with closer relationships.
163
Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
34
Your thumb is about the same size as your nose.
124
The average sperm cell swims at 8 inches per hour.
4
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22