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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

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For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

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The human body produces and destroys 15 million blood cells every second.

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The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.

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Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.

Head-Tail Source NGC 1265 Head-Tail Source NGC 1265
Phylogenetic tree based on the distribution of 120 alleles in 42 populations from around the world, Phylogenetic tree based on the distribution of 120 alleles in 42 populations from around the world,
Animal carcasses like this South African wildebeest provide important nutrition for both hunters and Animal carcasses like this South African wildebeest provide important nutrition for both hunters and
For the 2-year-old, encounters with peers provide valuable practice in communication and social ... For the 2-year-old, encounters with peers provide valuable practice in communication and social ...
The Many Sizes of Soft Drinks A bottle or can of soda can provide from 6 to 17 teaspoons of added The Many Sizes of Soft Drinks A bottle or can of soda can provide from 6 to 17 teaspoons of added
World Population, 1850–2150 World Population, 1850–2150
Video: Gastrulation: cross section of the frog

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