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Did you know?

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.

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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.

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Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.

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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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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.

Young whale with blowholes clearly visible Young whale with blowholes clearly visible
The small dorsal fin of this blue whale is just visible on the far left. The small dorsal fin of this blue whale is just visible on the far left.
Visible Views of Saturn Visible Views of Saturn
An 1891 cartoon blames immigrants for the ills of American society: anarchy, socialism, mayhem, and An 1891 cartoon blames immigrants for the ills of American society: anarchy, socialism, mayhem, and
National Guardsmen firing into a crowd of antiwar protesters at Kent State University killed four ... National Guardsmen firing into a crowd of antiwar protesters at Kent State University killed four ...
Christo, Over the River, Project for the Arkansas River, State of Colorado. Christo, Over the River, Project for the Arkansas River, State of Colorado.
Video: Hormonal regulation of pregnancy - weeks 2 through 38

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