Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
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
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
Enamel is hardest substance in the human body.
61