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
You forget 90% of your dreams.
256
Our brains have a negativity bias and will remember bad memories more than good ones.
15
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
Fingers prune underwater not because of them absorbing the water or washing away the oil, but because of an evolutionary trait caused by the brain to enhance the grip of your fingers underwater.
24
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
By weight, Bone is five times stronger than steel.
417