The human brain doesn't stop developing until about 25 years old.
102
Yawns are more contagious among people with closer relationships.
163
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
94
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
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