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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.
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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.