There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
A person can live without food for about a month, but only about a week without water.
156
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
Your body is creating and killing about 2.4 million red blood cells per second.
17
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
Within three days of death, the enzymes that once digested your food begin to eat you.
22