The pupil of the eye expands as much as 45 percent when a person looks at something pleasing.
130
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
About half of all Americans are on a diet on any given day.
29
Your tongue is the only muscle in your body that is attached at only one end.
173
About 400 different kinds of microbes live on and in the human body.
-3
Within three days of death, the enzymes that once digested your food begin to eat you.
22
You can alleviate a tickly throat by scratching your ear.
12
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139