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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

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Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.

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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.

Gorilla night nest constructed in a tree. Gorilla night nest constructed in a tree.
The organic compounds from which most cellular materials are constructed: the ABCs of biochemistry The organic compounds from which most cellular materials are constructed: the ABCs of biochemistry
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The fuelpressure sensor and fueltemperature sensor are often constructed together in one assembly ... The fuelpressure sensor and fueltemperature sensor are often constructed together in one assembly ...
To measure fuel-injector resistance, a technician constructed a short wiring harness with a double ... To measure fuel-injector resistance, a technician constructed a short wiring harness with a double ...
Phylogenetic tree constructed by comparing homologies in cytochrome c amino acid sequences Phylogenetic tree constructed by comparing homologies in cytochrome c amino acid sequences
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