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Did you know?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.

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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

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The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

The clotting process (coagulation). The clotting process (coagulation).
The Clotting Process The Clotting Process
In the 1960s, social psychologists did highly creative but controversial experiments. This photo, ... In the 1960s, social psychologists did highly creative but controversial experiments. This photo, ...
The lower respiratory tract and the process of gas exchange. The lower respiratory tract and the process of gas exchange.
Incineration Process Incineration Process
Nursing process Nursing process
Video: Semidiscontinuous DNA replication

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