Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
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
The aorta, the largest artery in the body, is almost the diameter of a garden hose.
37
When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
Every year your body replaces 98% of your atoms.
119
More people have a phobia of frogs than rats.
41
The average human body contains enough iron to make a small nail.
50