You can't tickle yourself.
29
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
The human brain has the capacity to store everything that you experience.
4k
Enamel is hardest substance in the human body.
61
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k