The world's shortest man measures only 21.5 inches.
73
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
Yawns are more contagious among people with closer relationships.
163
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
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
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
The human brain uses approximately as much energy as a 10 watt light bulb.
120