Déjà vu occurs when your brain tries to apply a memory of a past situation to your current one, fails, and makes you feel like it's happened.
12
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
It is impossible to hum if your nose is plugged.
366
The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
15

