It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
You can't tickle yourself.
29
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
93
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69
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
Obsessive nose picking is called Rhinotillexomania.
101