Your thumb is about the same size as your nose.
124
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
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
Due to the angle at which the optic nerve enters the brain, staring at a blue surface during sex greatly increases the intensity of orgasms.
252
Early American humans hunted car-size armadillos and used their shells for houses.
12
Pain occurs when sounds are above 130 db.
124
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Your fingernails grow faster in summer.
744