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Did you know?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

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The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.

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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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