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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.
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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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In 1864, the first barbiturate (barbituric acid) was synthesized.