An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
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
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
93
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
It takes approximately 12 hours for food to entirely digest.
93