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Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

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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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Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

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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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In 1864, the first barbiturate (barbituric acid) was synthesized.

Cast of the entire LB1 specimen Cast of the entire LB1 specimen
Myopia (nearsightedness). In the uncorrected top figure, the image comes into focus in front of the Myopia (nearsightedness). In the uncorrected top figure, the image comes into focus in front of the
The oral cavity. Anterior view of the open mouth. The oral cavity. Anterior view of the open mouth.
Henry VIII Humor Henry VIII Humor
In this design, the fuel injector is at the top of the cylinder and sprays fuel into the cavity of ... In this design, the fuel injector is at the top of the cylinder and sprays fuel into the cavity of ...
Apply oil or lotion to the entire leg with effleurage. Use light to medium pressure to warm ... Apply oil or lotion to the entire leg with effleurage. Use light to medium pressure to warm ...
Video: Mendel's pea plant, Pisum sativum experimental

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