By weight, Bone is five times stronger than steel.
417
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Every human spent about half an hour as a single cell.
144
Yawns are more contagious among people with closer relationships.
163
Pain occurs when sounds are above 130 db.
124
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82