The human sigh acts as a physiological reset button.
23
The average sperm cell swims at 8 inches per hour.
4
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
The average person's skin weighs twice as much as their brain.
131
If the human eye was a digital camera, it would have 576 megapixels.
25
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515