The average person's skin weighs twice as much as their brain.
131
The human brain doesn't stop developing until about 25 years old.
102
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
A human being loses an average of 40 to 100 strands of hair a day.
133
The human body contains over a billion miles of DNA.
147
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
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99