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Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

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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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The effects of organophosphate poisoning are referred to by using the abbreviations “SLUD” or “SLUDGE,” It stands for: salivation, lacrimation, urination, defecation, GI upset, and emesis.

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The cure for trichomoniasis is easy as long as the patient does not drink alcoholic beverages for 24 hours. Just a single dose of medication is needed to rid the body of the disease. However, without proper precautions, an individual may contract the disease repeatedly. In fact, most people develop trichomoniasis again within three months of their last treatment.

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There are 20 feet of blood vessels in each square inch of human skin.

The wild radish, Raphanus sativus, has become a model for studying the mating behaviour of plants. The wild radish, Raphanus sativus, has become a model for studying the mating behaviour of plants.
A visually impaired patient is assisted by a service dog. A visually impaired patient is assisted by a service dog.
Josiah Wedgwood, Queen's Ware dinner service (detail). Josiah Wedgwood, Queen's Ware dinner service (detail).
Induced-fit model of enzyme activity. Induced-fit model of enzyme activity.
A Mental Model of the Craftsman Experiment A Mental Model of the Craftsman Experiment
Effect of “Moral Restraint” in the Malthusian Model Effect of “Moral Restraint” in the Malthusian Model
Video: X chromosome inactivation in calico cats

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