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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.

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Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

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Thyroid conditions may make getting pregnant impossible.

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There are 20 feet of blood vessels in each square inch of human skin.

Ectopic pregnancies. (a) An ectopic pregnancy may occur in any of the locations shown. Interstitial Ectopic pregnancies. (a) An ectopic pregnancy may occur in any of the locations shown. Interstitial
Portuguese Warrior Surrounded by Manillas, Court of Benin, Nigeria. Portuguese Warrior Surrounded by Manillas, Court of Benin, Nigeria.
A magnetic sensor uses a permanent magnet surrounded by a coil of wire. The notches of the ... A magnetic sensor uses a permanent magnet surrounded by a coil of wire. The notches of the ...
IPCC model projections depend on greenhouse gas emissions IPCC model projections depend on greenhouse gas emissions
Projections of global temperature depend heavily on the level of future greenhouse gas emissions Projections of global temperature depend heavily on the level of future greenhouse gas emissions
This ciliated protozoan is a Stentor. Stentor are common in freshwater lakes and rivers This ciliated protozoan is a Stentor. Stentor are common in freshwater lakes and rivers
Video: Structure of Amino Acid, Peptide Bonds & Polypeptides

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