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Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.

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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

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Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.

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The familiar sounds of your heart are made by the heart's valves as they open and close.

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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.

World human population growth through history illustrates an exponential growth pattern. World human population growth through history illustrates an exponential growth pattern.
Siamese cat, classical colorpoint pattern Siamese cat, classical colorpoint pattern
The tiny male of the Golden orb weaver (Nephila clavipes) The tiny male of the Golden orb weaver (Nephila clavipes)
Normal male karyotype Normal male karyotype
Pelvis of male versus female Pelvis of male versus female
Type III curve. Mortality is highest early in life. Data for a desert shrub (Cleome droserifolia). Type III curve. Mortality is highest early in life. Data for a desert shrub (Cleome droserifolia).
Video: DNA fingerprinting Animation

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