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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

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Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

The evolution of an endemic island species from a mainland species. The evolution of an endemic island species from a mainland species.
Foliage height diversity and bird species diversity (data from MacArthur and MacArthur 1961). Foliage height diversity and bird species diversity (data from MacArthur and MacArthur 1961).
Physical and Perceptual Dimensions of Sound Waves Physical and Perceptual Dimensions of Sound Waves
Human activity has released carbon from sequestration in long-term reservoirs Human activity has released carbon from sequestration in long-term reservoirs
The time spent in each interval of one complete cell cycle of a human cell in culture The time spent in each interval of one complete cell cycle of a human cell in culture
A karyogram of the human chromosome set, showing the distinctive banding pattern of each chromosome. A karyogram of the human chromosome set, showing the distinctive banding pattern of each chromosome.
Video: Non-polar compounds - insolubility

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