25 Facts You Learned in School That Are No Longer True

25 Facts You Learned in School That Are No Longer True

Columbus didn't prove the Earth was round

Globe close-up of USADavid Crockett/Shutterstock

The Washington Post also reports that educated people had known for centuries that the Earth was round by the time Columbus set off on his journey. During the Middle Ages, some Europeans did start believing the Earth was flat despite the ancient Greeks stating the planet was a sphere during the time of Pythagoras in the sixth century B.C.E. By 1492, nobody worried that a ship at sea would fall over the planet's edge. The myth might have started with the publication of Washington Irving's 1828 fictionalized biography, The Life and Voyages of Christopher Columbus, which says erroneously that his journey to the Americas proved that Earth was round.

We use way more than 10 percent of our brains

Pieces of jigsaw on palm,Pieces of jigsaw puzzle in man's handsDoidam 10/Shutterstock

Although it sometimes seems like we're not running on all cylinders, brain scans show activity throughout the organ, even when we're resting. Nobody's sure where the idea came from that 90 percent of our brain tissue is going unused, but any neurologist will tell you that's definitely wrong. Learn more popular "facts" about the brain that actually aren't true.

ROYGBIV is not the lineup of colors in the rainbow

Blue sky and white cloud with sun light and rainbowPongMoji/Shutterstock

You probably remember learning the "ROYGBIV" initialism to represent the colors of the rainbow: Red, Orange, Yellow, Green, Blue, Indigo, and Violet. Today, though, everyone from teachers to color specialists have begun to forego indigo. The rainbow LGBT Pride flag also only has six colors—and many people are left to wonder why indigo, which seems to be just an arbitrary combination of two of the other colors (blue and purple/violet), found its way into the rainbow. Well, for that we can thank Sir Isaac Newton, a superstitious sort who believed that the number seven had a cosmic significance, per occult beliefs of the time. So he believed that seven colors, no more, no less, had to come together to make white, and chose indigo to join the other colors, potentially because of the popularity of indigo dye at the time.

25 Facts You Learned in School That Are No Longer True, Source:https://www.rd.com/culture/facts-you-learned-no-longer-true/

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