Giraffes only need 5 to 30 minutes of sleep in a 24 hour period.

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In the 1980s, people could download video games from radio broadcasts by recording the audio onto cassette tapes.

These tapes could then be played on computers to load the games.

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The eye color of owls indicates what time of day the owls prefer to be active.

Nocturnal owls: Have dark eyes, like the Barred Owl, and are active at night.

Diurnal owls: Have yellow eyes, and are active during the day.

Crepuscular owls: Have orange eyes, and are active at dawn or dusk.

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The oleander is the official flower of the city of Hiroshima because it was the first to bloom again after the explosion of the atomic bomb in 1945.

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🤔 According to Guinness World Records, Robert Wadlow of the United States (1918–1940) was the tallest person in recorded history, measuring 272 cm (8 ft 11 in) at the time of his death. 😱

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Vikings were the first Europeans to arrive in North America around the year 1000, nearly 500 years before Christopher Columbus.

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🌊 Starfish don't have blood. They circulate nutrients by using seawater in their vascular system.

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There is a mysterious expanding black goo called La Mancha Negra (the black stain) that covers parts of roads in Caracas, Venezuela. Millions of dollars have been spent researching it, yet the cause is still unknown. 1,800 people have died in auto accidents due to the goo.

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🤔 Bubble wrap was originally invented to be a kind of plastic wallpaper.

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The concept of using a card for purchases was described in 1887 by Edward Bellamy in his utopian novel Looking Backward. Bellamy used the term credit card eleven times in this novel, although this referred to a card for spending a citizen’s dividend from the government, rather than borrowing.

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Jack Daniel's used to make coffee that tasted like whiskey.

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If milk is added to coffee, the fat content of the milk causes human body to absorb caffeine at a slower rate, thus weakening its effect.

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Regular exercise in old age helps stop immune decline and shields people from infections.

Scientists tracked 125 long-distance cyclists some in their 80s, and found their immune systems worked like those of 20-year-olds.

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Sweden has more islands than any other country.

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Nordlingen, Germany, is buil|t inside a 15-million-year-old meteor crater.

The town has integrated parts of the meteor into its structures, including St. George's Church, which is encrusted with meteorites and microscopic diamonds.

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Coffee with salt was a very popular drink in the 18th century.

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Sound travels 4 times faster in water than in air.

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Nepenthes rajah is the largest of the pitcher plants, and it’s also the largest carnivorous plant in the world, sometimes referred to as the “king of the pitcher plants.” It is essentially a trap filled with up to three and half liters of water and two and a half liters of digestive fluid. It is evolved to lure insects to it, and when the insects fall in they are unable to escape and are digested by the plant. On a number of occasions rats have been found half-digested inside the pitchers, and other small vertebrates such as small birds, lizards, and frogs occasionally fall victim to the plants as well.

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In 1977, Shakuntala Devi, known as the "human computer,"' extracted the 23rd root of a 201-digit number in 50 seconds. Her answer, 546,372,891, was later confirmed by the UNIVAC 1101 computer at the U.S. Bureau of Standards, which required a special program for this calculation.

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