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Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

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According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

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Human kidneys will clean about 1 million gallons of blood in an average lifetime.

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The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.

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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

A revised animal phylogeny based on molecular data of SSU rRNA A revised animal phylogeny based on molecular data of SSU rRNA
The proportion of obese and extremely obese adults in the United States has increased over the past The proportion of obese and extremely obese adults in the United States has increased over the past
Running time on 100-meter sprint for men and women master athletes increases with age. Source: Korho Running time on 100-meter sprint for men and women master athletes increases with age. Source: Korho
This 1900 photograph of steel factories at night in Duquesne, near Pittsburgh, was tinted by hand. S This 1900 photograph of steel factories at night in Duquesne, near Pittsburgh, was tinted by hand. S
The flow of genetic information in a typical cell The flow of genetic information in a typical cell
The time at which the mailman delivers the mail to Ace Bike Shop follows a normal distribution ... The time at which the mailman delivers the mail to Ace Bike Shop follows a normal distribution ...
Video: Calvin cycle (The light-independent reactions )

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