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
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Poor eyesight (myopia) is associated with higher IQ.
232
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
Gorillas can catch human colds and other illnesses.
205
There are about 255 babies born worldwide every minute.
46