When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
Gorillas can catch human colds and other illnesses.
205
We forget why we have entered a room because passing through doors creates an ‘event boundary’ causing the brain to file away what we were just thinking about.
26
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
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
Early American humans hunted car-size armadillos and used their shells for houses.
12