Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
We share 70% of our DNA with a slug.
218
Due to the angle at which the optic nerve enters the brain, staring at a blue surface during sex greatly increases the intensity of orgasms.
252
A human being loses an average of 40 to 100 strands of hair a day.
133
By weight, Bone is five times stronger than steel.
417
Human hair and fingernails continue to grow after death.
7