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Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.
Did you know?
There are more bacteria in your mouth than there are people in the world.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
Did you know?
There are approximately 3 million unintended pregnancies in the United States each year.