A Few Common Misconceptions

Common misconceptions: various fallacious, misleading, or otherwise flawed ideas that are widely around the globe thought to be true.

Here are a few I thought you'd all find interesting.

-George Washington did not have wooden teeth. According to a study of Washington's four known dentures by a forensic anthropologist from the University of Pittsburgh, the dentures were made of gold, hippopotamus ivory, lead, and human and animal teeth (including horse and donkey teeth).

-There is no evidence that Vikings wore horns on their helmets.

-It is commonly claimed that the Great Wall of China is the only man-made object visible from the Moon. This is false. None of the Apollo astronauts reported seeing any specific man-made object from the Moon, and even earth-orbiting astronauts can barely see it, but city lights are easily visible on the night side of Earth from orbit.

-The claim that a duck's quack does not echo is false, although the echo may be difficult to hear for humans under some circumstances.

-Bats are not blind. While most bat species do use echolocation to augment their vision, all bat species have eyes and are capable of sight.

-Sharks can actually suffer from cancer.

...And so on and so forth. If you want to see dozens more facts, here's the complete list.