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In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

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If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

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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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Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

Forest fragments left by clear-cutting forest from the surrounding landscape have very different phy Forest fragments left by clear-cutting forest from the surrounding landscape have very different phy
Relationship between levels of COHb in blood and concentration of CO in the surrounding air Relationship between levels of COHb in blood and concentration of CO in the surrounding air
Midsagittal image of the head on an MRI scan Midsagittal image of the head on an MRI scan
LBJ cultivated the masculine image of a Texas cowboy. Biographers have suggested that Johnson was ... LBJ cultivated the masculine image of a Texas cowboy. Biographers have suggested that Johnson was ...
These photos show a rat burying a test object from which it has just received a single mild shock. These photos show a rat burying a test object from which it has just received a single mild shock.
The enthalpy change for converting 10.0 g of ice at -25.0 C to water at 80.0 C is ________ kJ. ... The enthalpy change for converting 10.0 g of ice at -25.0 C to water at 80.0 C is ________ kJ. ...
Video: What is Reverse Osmosis?

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