There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118