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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.

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Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

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Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

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Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.

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Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

A single crossover inserts F at a specific locus, which then determines the order of gene transfer A single crossover inserts F at a specific locus, which then determines the order of gene transfer
Single E. coli bacterium Single E. coli bacterium
Disposable, single use thermometer strip Disposable, single use thermometer strip
The RecA strand exchange reaction as shown from single-molecule studies The RecA strand exchange reaction as shown from single-molecule studies
The structure of a single developed neuron The structure of a single developed neuron
Testcross of a single character Testcross of a single character
Video: Second Messengers in the Inositol-lipid Signaling Pathway

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