Gorillas can catch human colds and other illnesses.
205
The human brain has the capacity to store everything that you experience.
4k
Enamel is hardest substance in the human body.
61
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
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
The average sperm cell swims at 8 inches per hour.
4
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