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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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Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.

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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

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Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

Large male size and mating success. Large male size and mating success.
Sexual dimorphism in body size and mating system. Sexual dimorphism in body size and mating system.
Tiger quoll sleeping at the window of the nocturnal animals exhibit at Sydney Wildlife World Tiger quoll sleeping at the window of the nocturnal animals exhibit at Sydney Wildlife World
Chimpanzees and horses have brains that are similar in size. Chimpanzees and horses have brains that are similar in size.
This chart illustrates the “drip down” model of government. In this, politics is formed by the soc This chart illustrates the “drip down” model of government. In this, politics is formed by the soc
Relative Ventricular Size in Chronic Schizophrenics and Controls Relative Ventricular Size in Chronic Schizophrenics and Controls
Video: Gastrin (protein digestion)

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