A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
You can't tickle yourself.
29
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
You forget 90% of your dreams.
256
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Enamel is hardest substance in the human body.
61
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