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Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

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There are more bacteria in your mouth than there are people in the world.

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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

Hormonal control of parturition. Hormonal control of parturition.
Alternative forms of surgeries involving the uterus, ovaries, and fallopian tubes. The solid lines i Alternative forms of surgeries involving the uterus, ovaries, and fallopian tubes. The solid lines i
The constellation of Leo as it can be seen by the naked eye. Lines have been added. The constellation of Leo as it can be seen by the naked eye. Lines have been added.
The proportion of obese and extremely obese adults in the United States has increased over the past The proportion of obese and extremely obese adults in the United States has increased over the past
Feedback control of the adrenal cortex. Feedback control of the adrenal cortex.
Internal and External Loci of Control Internal and External Loci of Control
Video: The life cycle of protein

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