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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

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The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.

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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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In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

Structure and function of the thick and thin filaments. Structure and function of the thick and thin filaments.
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The structure of the Sun The structure of the Sun
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Structure of the Dnmt3a heterotetramer complexed with a DNA 25-mer Structure of the Dnmt3a heterotetramer complexed with a DNA 25-mer
Lewis structure of (CH3)2CHOCH2CH2CH2OH Lewis structure of (CH3)2CHOCH2CH2CH2OH
Video: Role of the respiratory system - effect of altered ventilation rates

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