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Did you know?
The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.
Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
Did you know?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.