Early American humans hunted car-size armadillos and used their shells for houses.
12
Gorillas can catch human colds and other illnesses.
205
It takes about 20 seconds for a red blood cell to circle the whole body.
102
Your fingernails grow faster in summer.
744
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
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89