When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
The average person's skin weighs twice as much as their brain.
131
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
Babies crawl an average of 200m a day.
212
Poor eyesight (myopia) is associated with higher IQ.
232
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
By weight, Bone is five times stronger than steel.
417