It takes about 20 seconds for a red blood cell to circle the whole body.
102
The skin on your lips is 200 times more sensitive than your fingertips.
345
Within three days of death, the enzymes that once digested your food begin to eat you.
22
The male fetus is capable of attaining an erection during the last trimester.
75
Most lipstick contains fish scales.
37
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