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Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
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?
There are more bacteria in your mouth than there are people in the world.
Did you know?
Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.
Did you know?
Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.