Everyone was taught things that turned out to be wrong. Here are four of them.

Low-fat diets are the healthiest; fat makes you fat and causes heart disease
Healthy fats are essential; excess carbs/sugar often worse; quality over low-fat
nutrition corrected 2015
Neanderthals were dumb, brutish cavemen
Sophisticated culture, art, tools; interbred with modern humans
science corrected 2010
Christopher Columbus discovered America and proved the Earth is round
Natives there millennia; round Earth known since ancient Greeks; Vikings earlier
history corrected 1990
Pluto is the ninth planet in our solar system
Pluto is a dwarf planet; the solar system has eight planets
science corrected 2006

Those are everyone’s. What were you taught? Enter the year you were born and see the ones that were corrected during your lifetime.

100+
debunked beliefs
8
categories
1800
earliest correction

For most of history, the answer to “how do we know?” was whoever was in charge. A king. A church. A textbook. You were supposed to accept it. We got better when we started treating those answers as theories — guesses that have to survive being proven wrong. That is why this site exists. Every card is something that was taught as fact, then replaced by a better explanation. Being wrong on purpose is the method.

Why that matters

Know Something That Turned Out to Be Wrong?

If you remember being taught something that has since been disproven, suggest it below. Every submission is reviewed before being added.

All submissions are reviewed before publishing.