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People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

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Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.

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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

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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.

20,000 year old spotted hyena painting from the Chauvet Cave, France 20,000 year old spotted hyena painting from the Chauvet Cave, France
Chinese workers on a railway in the far West. “Without them,” Leland Stanford, president of the Cent Chinese workers on a railway in the far West. “Without them,” Leland Stanford, president of the Cent
In this cartoon, Boss Tweed welcomes cholera—a skeletal figure of death carrying a handbag from “Asi In this cartoon, Boss Tweed welcomes cholera—a skeletal figure of death carrying a handbag from “Asi
The percentage of women who have cohabited by the age of 45 for 17 countries shows that the ... The percentage of women who have cohabited by the age of 45 for 17 countries shows that the ...
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Plot of the percentage of X-linked recessive mutations Plot of the percentage of X-linked recessive mutations
Video: Integumentary Anatomy

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