Your thumb is about the same size as your nose.
124
If the human eye was a digital camera, it would have 576 megapixels.
25
Only humans shed emotional tears.
331
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
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