Misconceptions

Julius Caesar did not coin the phrase "The die is cast", which he remarked before crossing the Rubicon. According to Plutarch, the phrase was common even in Caesar's day, having been used by the Greek dramatist Menander. Furthermore, there is some doubt whether Caesar even said this phrase, as he does not mention using this phrase in his writings. (source)

Canute (also spelled Knut), King of England (1016–1035) and of Denmark and Norway for most of that time, is well-known for having ordered the tide to retreat. He did not, however, order the tide to halt because he thought that he could stop it. He did it to demonstrate to sycophants that he was not omnipotent. [ Misconceptions | Royalty | Medieval England ]

The Hundred Years' War actually lasted 116 years, from 1337 to 1453. [ Weapons and Battles | Misconceptions ] (source)

It is not true that the early Chinese used gunpowder only for fireworks. They had forms of guns (invented in 1288), bombs, grenades, rockets, landmines, flamethrowers, small cannons, and other weapons. [ China | Misconceptions | Weapons ]

Few witches were burned during the Middle Ages. Most witch-burnings occurred in later centuries.

In the fifteenth century, Prince Henry the Navigator dispatched his sea captains on voyages to explore the African coast. One of Henry's hopes was that his men would discover the rich Christian kingdom of "Prester John", which was cut off from the rest of Christendom by the Islamic conquest. The Portuguese rounded the Cape of Good Hope and sailed the east coast of Africa, only to find that Prester John's kingdom did not exist. While they found a Christian kingdom in Ethiopia, it was dismissed as being that of Prester John due to its poverty. [ Exploration | Misconceptions ] (source)

The Emancipation Proclamation did not free any slaves. Issued by Abraham Lincoln to take effect on New Year's Day 1863, the proclamation freed only slaves in the areas controlled by the rebel Confederate government, where Lincoln had no authority to enforce it. [ Misconceptions | Laws and Customs | Slavery ] (source)

In 1903, Albert Michelson, one of the 19^th century's top physicists, commented "The more important fundamental laws and facts of physical science have all been discovered, and these are so firmly established that the possibility of their ever being supplemented in consequence of new discoveries is exceedingly remote". Two years later, Einstein published his revolutionary Theory of Special Relativity. [ Misconceptions | Physics ]

As late as 1820, the universe was thought by European scientists to be 6,000 years old. It is now thought to be about 13,700,000,000 years old. [ Misconceptions | The Universe ] (source)

The Eastern side of the Panama Canal connects to the Atlantic Ocean and the Western side of the canal to the Pacific, not the other way around. [ Geography | Misconceptions ] (source)

Ostriches never stick their heads in the sand, not for any reason at all. [ Animals | Misconceptions ] (source)

In 1985, NASA estimated that the probability of an accident occurring to the space shuttle was 1 in 100,000. However, on January 28, 1986, only the 25^th shuttle launch, Challenger exploded after take-off, killing all seven astronauts aboard, and on February 1, 2003, the 113^rd mission, Columbia exploded on re-entry, again killing all seven astronauts. Earlier estimates by other groups had estimated the probability as being closer to 1 in 100, a probability that seems more reasonable. [ Exploration | Misconceptions | Statistics ]

Heart attacks generally do not kill people. It is the complications from heart attacks, such as scarring of the heart tissues, that kill people. [ Medicine and Health | Misconceptions ] (source)

While Chicago is rather windy (although nowhere near the windiest in the United States; its average wind speed of 10.4 miles per hour ranks it sixteenth in the list of windiest U.S. cities, with Great Falls, Montana the windiest at 13.4 miles per hour), its nickname of the "Windy City" is not because of its weather. It was christened the "Windy City" by the editor of the New York Sun, Charles Dana during the 1893 World Exposition. He was referring to the long-windedness of Chicago's politicians and their ceaseless boasting about their city and about the Expo. [ Place Names | Misconceptions ] (source)

The Sahara Desert, while it is the largest desert in the world, is not the largest sand desert in the world. Most of the Sahara consists of rock. The largest sand desert in the world is the Great Arabian Desert, or Rub-al-Khali, in the Arabian Peninsula. [ Misconceptions | Geography ] (source)

Arabic numerals are not Arabic. While Europe obtained this system from the Arabs, the Arabs in turn obtained this system from the Hindus around the middle of the eighth century. The Hindu writer Aryabhata first described the new system in the year 499. [ Numbers and Measurement | Misconceptions | India ] (source)

It is untrue that carrots are good for your eyes. This belief started in World War II, when the British began using airborne radar, allowing them to find German bombers at night. In order to mislead the Germans, a rumour was spread indicating that John Cunningham, the Royal Air Force's most successful night fighter pilot, had developed phenomenal night sight by eating carrots in large quantities. [ Food | Misconceptions ]

Abner Doubleday did not invent the game of baseball. The story of his invention of the game was created many years later based on hearsay. Alexander Cartwright, a New York City bank clerk who devised several changes to the American form of rounders in 1844, is the best candidate for the inventor of baseball. [ Misconceptions | Sports and Games ] (source)

The Jerusalem artichoke is neither from Jerusalem nor an artichoke; it belongs to the sunflower family. The Italians called it girasole articciocco, "sunflower artichoke". Over the years girasole became "Jerusalem". [ Food and Drink | Misconceptions ] (source)

There was no grass during the time of the dinosaurs. Grass evolved from bamboo-like plants only 24 million years ago.

Napoleon was not particularly short. He was 5 feet 6½ inches tall, which was a typical height at the time. This height is equal to 5 feet 2 inches in old French feet (pieds du roi), which led to confusion as to his true height. [ Numbers and Measurement | Misconceptions ] (source)

There is no silver in German silver. It consists of copper, zinc, and nickel. (source)

It isn't true that many of the strange, outdated laws that are still on the books in various jurisdictions are never enforced. In 1999, after falling out of his canoe on the Rifle River in Michigan, a 25-year-old man was convicted for violating an 1897 law prohibiting cursing in front of women and children, and sentenced to four days work in a child-care program plus a $75 fine. However, the law was struck down by the Michigan Court of Appeals in 2002 and the conviction thrown out. [ Laws and Customs | Misconceptions ] (source)

The phrase "Beam me up, Scotty" was never uttered during an episode of Star Trek. (source)

Fortune cookies are American, not Chinese. They were invented by George Jung, a Chinese immigrant to the United States, in 1918. (source)

The original boomerangs, used by Australian aboriginals, did not return. They were used for hunting, where returning would be a disadvantage. (source)

The primary aim of the Inquisition, which operated between the twelfth and fifteenth centuries, was the conversion of heretics, not their destruction. After three detailed cautions, if a person persisted in their views, that person would then be considered a heretic. Even then, that did not always lead to being burned at the stake; there were Inquisitors that did not pass a single death sentence. (source)

The Wright Brothers did not fly the first manned airplane. On August 14^th, 1901, a man named Gustav Albin Whitehead (born Weisskopf), flew a plane around half a mile (800 metres). However, without documentation such as photographs to support his claim, there was significant scepticism about his claim and it was not taken seriously. (source)

Lead pencils contain no lead. Lead pencil is as much a misnomer as it would be to call a horse a cow. Red lead is an oxide of lead, and white lead is a carbonate of lead, but the black lead used in pencils is neither a metal nor a compund of metal. It is plumbago or graphite, one of the forms of carbon. (source)