The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
The human body produces and destroys 15 million blood cells every second.
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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).
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The longest a person has survived after a heart transplant is 24 years.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
Comet Tempel 1 67 seconds after colliding with the Deep Impact probe.
Fully Convective Star
DDT impact on human health
Correlates well with global temperature prior to the impact of GHG emissions