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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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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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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.