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Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

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The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

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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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The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

Fuel efficiencies of conventional and hybrid vehicles Fuel efficiencies of conventional and hybrid vehicles
Most newer vehicles have a triangle symbol indicating the recommended hoisting lift location. Most newer vehicles have a triangle symbol indicating the recommended hoisting lift location.
Most vehicles will be correctly positioned when the left front tire is centered on the tire pad. Most vehicles will be correctly positioned when the left front tire is centered on the tire pad.
This red gasoline container holds about 30 gallons of gasoline and is used to fill vehicles used ... This red gasoline container holds about 30 gallons of gasoline and is used to fill vehicles used ...
A symbol showing an engine with an arrow pointing down is used on some General Motors vehicles to ... A symbol showing an engine with an arrow pointing down is used on some General Motors vehicles to ...
A TECH 2 scan tool is the factory scan tool used on General Motors vehicles. A TECH 2 scan tool is the factory scan tool used on General Motors vehicles.
Video: Fermentation pathways

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