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There are 20 feet of blood vessels in each square inch of human skin.

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Excessive alcohol use costs the country approximately $235 billion every year.

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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

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Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.

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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

There are multiple pathways for heat exchange between organisms and the environment. There are multiple pathways for heat exchange between organisms and the environment.
The rock cycle and the Earth’s physical environment The rock cycle and the Earth’s physical environment
An infant begins to notice the external environment by the age of 4 to 8 months An infant begins to notice the external environment by the age of 4 to 8 months
Self-esteem for Grade 3 and 4 children in Harter\'s studies Self-esteem for Grade 3 and 4 children in Harter\'s studies
Another question for grade 11 math Another question for grade 11 math
The effect of gene–environment interaction The effect of gene–environment interaction
Video: Primate Evolutionary Tree Animation

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