A person can live without food for about a month, but only about a week without water.
156
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
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
The average person's skin weighs twice as much as their brain.
131
Only humans shed emotional tears.
331
Pain occurs when sounds are above 130 db.
124
The average sperm cell swims at 8 inches per hour.
4
