Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
It takes about 20 seconds for a red blood cell to circle the whole body.
102
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
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18