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Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
Did you know?
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
Did you know?
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

