A human being loses an average of 40 to 100 strands of hair a day.
133
The human sigh acts as a physiological reset button.
23
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
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515