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Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

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The average adult has about 21 square feet of skin.

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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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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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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

Snout and mouth of sand tiger shark, showing protruding teeth and small eyes Snout and mouth of sand tiger shark, showing protruding teeth and small eyes
Snow Leopard - Showing teeth at Taronga Zoo, Australia Snow Leopard - Showing teeth at Taronga Zoo, Australia
Deciduous and permanent teeth. (A) The deciduous teeth, with the age of eruption given in months; (B Deciduous and permanent teeth. (A) The deciduous teeth, with the age of eruption given in months; (B
Fish teeth Fish teeth
(a) The Dmanisi cranium (right) shows similarities to early African H. erectus including the Narioko (a) The Dmanisi cranium (right) shows similarities to early African H. erectus including the Narioko
Teeth pitted by fluorosis Teeth pitted by fluorosis
Video: Spinal Cord Injury Animation

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