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Did you know?

Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.

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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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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

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More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

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Conversion of F+ to an Hfr state occurs by integration of the F factor Conversion of F+ to an Hfr state occurs by integration of the F factor
Red Spotted Newt (Notophthalmus v. viridescens), New Hampshire state animal. Red Spotted Newt (Notophthalmus v. viridescens), New Hampshire state animal.
Video: Cytotoxic T cell receptors, activation, proliferation, differentiation & action

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