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Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

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The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

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Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

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Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

Examples of the results of sexual selection, a type of natural selection. Examples of the results of sexual selection, a type of natural selection.
Allen Test: An occluded ulnar artery results in continued pallor of the hand while the radial artery Allen Test: An occluded ulnar artery results in continued pallor of the hand while the radial artery
Mental Health in the U.S: Survery Results Mental Health in the U.S: Survery Results
National Results of the Scholastic Assessment Test (SAT) National Results of the Scholastic Assessment Test (SAT)
Results of a cross involving two genes located on the same chromosome Results of a cross involving two genes located on the same chromosome
An electropherogram showing the results of a DNA profile analysis An electropherogram showing the results of a DNA profile analysis
Video: DNA fingerprinting Animation

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