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

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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

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According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Pseudo stratified ciliated columnar epithelium Pseudo stratified ciliated columnar epithelium
Portuguese Warrior Surrounded by Manillas, Court of Benin, Nigeria. Portuguese Warrior Surrounded by Manillas, Court of Benin, Nigeria.
Population Projections of the United States Population Projections of the United States
Early cities were small economic centers surrounded by walls to keep out enemies. These cities had ... Early cities were small economic centers surrounded by walls to keep out enemies. These cities had ...
The retina-geniculate-striate system: the neural projections from the retinas through the lateral ... The retina-geniculate-striate system: the neural projections from the retinas through the lateral ...
Ciliated protozoan Tetrahymena with buccal cavity visible. Ciliated protozoan Tetrahymena with buccal cavity visible.
Video: Facilitated Diffusion - Glucose transport

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