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
Early American humans hunted car-size armadillos and used their shells for houses.
12
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
It takes about 20 seconds for a red blood cell to circle the whole body.
102
Babies crawl an average of 200m a day.
212
The average person's skin weighs twice as much as their brain.
131
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99