From one of the most useful Wikipedia pages…

• Sun Tzu did not originate the saying, “Keep your friends close and your enemies closer” in the Art of War or in any other text.
• There is no dark side of the Moon; every part of the Moon’s surface (save perhaps deep craters near the poles) is illuminated by the Sun roughly half of the time.
• Different tastes can be detected on all parts of the tongue, with slightly increased sensitivities in different locations depending on the person.
• Shaving does not cause hair to grow back thicker or coarser.
• Koalas are not bears; Monkeys are not apes, and apes are not monkeys.
• The notion that goldfish have a memory of only three seconds is completely false.
• While the Earth’s north magnetic pole is near the geographic north pole, it is a south magnetic pole in physics terms.
• The Sahara is not the world’s largest desert.
• Pong was not the first video game.
• Thomas Edison did not invent the light bulb and Guglielmo Marconi did not invent the radio.