Asklemmy

That the 13^th^ amendment outlawed slavery.

That looking too closely at the screen will blind you or damage your eyes. This myth originated decades ago in the 1960s from an advertisement by a television manufacturer. Basically in 1967 General Electric reported that their color TVs were emitting too many x-rays due to a factory error, so health officials recommended keeping children and pretty much anyone else at a safe distance from the screen. The problem was soon resolved, but the myth endured.

If you ask me I would say that x-ray radiation has little to do with going blind, I have no idea if radiation can actually make you blind, but it's funny how somehow eye diseases got in the way as the only possible consequences in the myth just because we use our eyes to watch TV.

That trans women on hormones have a significant advantage in sports

I always think about when I was taught about taste and the human tongue back in grade school, they had these diagrams about zones on the tongue corresponding to sweet, sour, bitter, etc. like a "taste map". I'm not sure how many generations were taught about it but turns out it just isn't true at all. So, not like it's important but you got a lot of misinformed folks out there in regards to taste lol

That you own your PC

Birds!

That by not being ridiculously overtly bigoted, they have actually interrogated and rejected their own bigotry. The former is basic and mostly relies on social conditioning. The latter requires reading history and people who are criticizing things with which you may identify and therefore take very personally. The latter is not taught in school and school does not provide the tools (outside of literacy) to do so, so it's a difficult, painful, abd regrettably rare thing to see, usually requiring sone trauma to change.

That the first amendment and free speech are the same thing

You have to completely decharge batteries before recharging them.

That they're right. You should be able to question your own opinions. A lost art, it seems

That the average person will swallow 8 spiders a year in their in their sleep.

Americans: You’re not tired after eating Thanksgiving dinner because of tryptophan in the turkey, you’re tired because you ate a lot of food.

That learning styles exists

That humans use 10% of our brains. We use 100%. Intelligence is correlated with the type of brain matter present.

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That cold water will boil faster than warm water.

It's a confusion. You should always cook with cold tap water, not hot, because hot tap water can contain excessive amounts of lead.

There are several instances where hot water can freeze faster than lukewarm water. I believe people saw this on shows such as Bill Nye and then forgot the specifics.

I know it's low hanging fruit, but religion.

The Bibel

Nearly anything abouth Pre-Columbian North and South America. Turns out, there was no homogeneous "Native" culture, just as there was no "European" culture. Every different group had their own traditions and stories. They all were complex people, not one-dimensional savages or pacifists. We should simply view them as any other people.

That there are heroic countries in the world.

They are good drivers.