By weight, Bone is five times stronger than steel.
417
Only humans shed emotional tears.
331
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The human brain has the capacity to store everything that you experience.
4k
Yawns are more contagious among people with closer relationships.
163
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132