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Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

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The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

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The familiar sounds of your heart are made by the heart's valves as they open and close.

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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

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Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

By convention, Φ and Ψ are 180° (or –180°) By convention, Φ and Ψ are 180° (or –180°)
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James Madison was a key figure at the Constitutional Convention of 1787 in Philadelphia. He not only James Madison was a key figure at the Constitutional Convention of 1787 in Philadelphia. He not only
Hydrocarbon Numbering Convention Hydrocarbon Numbering Convention
If 0.40 mol of NaN3 reacts completely in the reaction shown below, then ________ L of N2 will ... If 0.40 mol of NaN3 reacts completely in the reaction shown below, then ________ L of N2 will ...
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