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Facts can and do change as new evidence comes to light—it’s a core part of what science is all about. As we learn more and more about how the world works, we have to update our existing bodies of knowledge. 

This does, however, mean that some information that we learned in the classroom can become outdated within our lifetimes, as members of the r/ask online community recently shared in a viral thread. We’ve collected some of these internet users’ insights about what facts have changed since they learned them in school. Scroll down to read what they had to share.

Bored Panda got in touch with the author of the viral thread, redditor u/karatass91. They were kind enough to share a few insights on facts changing over time. You'll find their thoughts as you read on.

#1

30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward "High school's gonna be the best four years of your life!"

Reader, it was not the best four years of my life

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Robin DJW
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Hugs indeed. I knew this was BS when I heard it 55 years ago. In retrospect, those 4 years may have been the worst of my life.

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Corvus
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

College years were better. Moving out to live on my own, even more so.

S&P
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Plus if you choose to study in a program you're passionate about, odds are you'll meet a lot of people who are also passionate about the same thing.

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Tucker Cahooter
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I'm trying my best to forget my teenage years (also my 20s, 30s, 40s...)

lwolf1952
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

As a teenager I was never fully awake until 2:00 in the afternoon.

Owen
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I think the best years of my life were the 4yrs after highschool. Young, dumb & free.

Meilin Kai
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Worst 4 years of my life. I don't even really have a good excuse--just teenage hormones and very low self-esteem.

Poppy
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

High school was hell. Undiagnosed ADHD, severe depression and anxiety and being bullied meant I suffered badly.

Castles
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Tbh I would love to go back to high school. Wasn’t an amazing place but better than the place I’m at now

Nimitz
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

What's really messed up is that it's the worst four years of your life, and yet, somehow, it can actually get worse from there...

Chickens are fluffy
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Still not the best four years of life for people going through it. Can confirm

Shawn Matalino
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

The only people saying that are the ones that peaked in high school

LuLuBelle
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Same. I hated it and to this day I don't particularly care for teenagers. They're awful.

Scott Wilkins
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

High School was the WORST FOUR YEARS of my life. And I was in actual combat...

Joe Bloe
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Highly subjective, many people think it was a good time.

Ben
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I thought the saying was college and not hight school.

Jessica SpeLangm
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Band class was the best 4 years of my life. The rest of high school was just short of h**l for me.

kybourbonpearls
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I must be one of the minority who would say that it was the BEST four years of my life!

Amy Smith
Community Member
10 months ago (edited) DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Not the best, but I met some of the best friends I've ever had in Secondary School

Giles McArdell
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

So true, I hated school. Occasionally I have to go to my son's school and I still hate them.

trevor
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

First year High School..... hardest three years of my life.

okpkpkp
Community Member
9 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I lasted 4 months then went and took the GED and passed that.

Viv Hart
Community Member
9 months ago (edited) DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

It was mine! I'm still friends with a number of my classmates, including my old crush!

Stan Chung
Community Member
9 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Yes, it use to be school was the best years of your life. I didn't get that at all. Working and having my own money to spend is sooo much better!

Rahb in Oz
Community Member
9 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Maybe. I loved school until year 10, then it turned to c**p.

michele mbennett101044@yahoo.c
Community Member
9 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Are you kidding?!! Worst and least important 4 yes ever! Most everything we were taught is pure c**p 💩 now

Brian Droste
Community Member
9 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I don't think my high school days were the best days if my life, but I don't think they were my worst days of my life either.

Myron Gudz
Community Member
9 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I only enjoyed the first 2 years, before I moved to another school.

Nykky
Community Member
9 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I was told this by so many people. I've yet to experience the best year in my life at all

Lovemyisland ️
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Well for me there were not the best of my life but there were really good. I loved them, lots of good memories and lots of friends that I still talk to today.

Gary Harkins
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I had a blast in high school! Tough to call it the best 4 years because I was also in the military, but it was definitely a lot of fun!

Mike m
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Reminiscing about having no responsibility is great until you remember you couldn't buy alcohol.

Michelle Brandt
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Didn't hate high school, but it wasn't the best 4 years of my life either.

Shadow
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

What are the ages? Cause we have 5 years of high school (12 to 17 year old)

keyboardtek
Community Member
10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Someone once observed that humans spend the rest of their lives either living up to, or living down, their reputations in high school.

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    #2

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward You can’t carry a calculator all day!

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    sbj
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    If you went to school in the 90's like me you don't need one for simple calculations and I find people today rely too heavily on them and don't think that they may have made a typo

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    #3

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward Trickle down economics

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    lwolf1952
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Oh, it's been proven all right. Proven to make the 1% richer and dismantle the middle class.

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    NPR points out that scientific knowledge is constantly evolving and changing. It's not just completely new facts that are discovered. Researchers also take new evidence into account and then use it to reexamine what we thought we already knew. 

    "The key is that scientific conclusions don't change on a whim. They change in response to new evidence, new analyses, and new arguments—the sorts of things we can publicly agree (or disagree) about, that we can evaluate together. And scientific conclusions are almost always based on induction, not deduction. That is, science involves drawing inferences from premises to conclusion, where the premises can affect the probability of the conclusions but don't establish them with certainty," NPR explains why we can trust science despite facts changing.

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    #4

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward If you learn well, you`ll get a good job and will have a nice future. Total BS.

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    Ken Beattie
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    It's not just about learning well, it's about learning something valuable. And realistically, that isn't (and never has been) a guarantee for a good job and a nice future. But it IS a big stepping stone towards one.

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    #5

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward My teachers used to say "Video games will make you braindead." Turns out video games were all about solving puzzles and problem solving and ended up increasing the cognitive abilities and critical thinking skills for children from a young age.

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    Ken Beattie
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    I think they can still be problematic though, because some of them trigger the addiction centres of the brain. So the gameplay cycle literally addicts you to the game like people get addicted to gambling or other things. Like most things, I think moderation is a good thing.

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    Bored Panda was curious to get the OP's thoughts as to what we could all do to stay up to date with (at least some) of the changes in science. The idea is so that we don't feel like we've fallen too far behind.

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    "The point here is to find reputable and reliable sources," redditor u/karatass91 said that this lies at the core of good scientific education.

    On top of that, they suggested taking on an even more direct approach to education by "establishing online connections with researchers." This way, you could be at the cutting edge of science... at least in the areas that interest you the most.

    #7

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward Animals don't use tools.

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    Annik Perrot
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Our first cat used the shutter's hook to bang on the window when it was closed and she wanted in.

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    #8

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward Grade school in the US, mid 1970s: We will be converting to the metric system soon.

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    Nilsen
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    I will not say that the USA is the only country on earth that use the Imperial system. There are others. Like Liberia, Myanmar, and Micronesia. Well over 7 000 000 000 of us use the Metric system.

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    #9

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward While I was in college biology our teacher said she was forced to teach us that cell walls were rigid because that's what the text book said but, she told us, it was not true--the phospho-lipid cell wall had just been discovered. So we learned it wrong and corrected all at the same time.

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    David Paterson
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Wow! That must be an old text book. The lipid cell membrane was known to be flexible in the year 1925, and confirmed in the late 1950s.

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    According to the OP, there probably will never be a point in time when the facts that we know about the world will never change again.

    "I don't think that the facts about the world will stop changing, since our understanding evolves with ongoing research and discoveries," they told Bored Panda.

    #10

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward That Christopher Columbus discovered America. Just ask native Americans about this one.

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    Ken Beattie
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    To be fair he did discover it. And so did the vikings. And so did the people who crossed the land bridge from Europe wayyyyy before that. Things that are not known by a group get discovered by that group and it doesn't preclude another group who have no awareness of it from discovering it too.

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    #11

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward Areas of taste on the human tongue

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    John Bababuie
    Community Member
    10 months ago (edited) DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    This is misleading, while different taste receptors are spread all over the tongue, they are in fact more common in certain areas. So it is still possible to for example to taste bitterness with the tip of the tongue, however the taste is way more potent on the back of the tongue. Edit: grammar Edit 2: check the comments please, Ace has an important addition

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    #12

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward Gen X here.

    We'll run out of oil by 2000.

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    Ken Beattie
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    I remember something along those lines too. Pretty tough being in high school and thinking, what will get me first, nuclear war, acid rain, the hole in the ozone layer, starvation because of no fossil fuels or aids.

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    The author opened up to us that they never thought that their question would get so much attention on Reddit. "I know it was a good question, but never had such an expectation," they said.

    "I think it went viral because I believe every redditor went to school and they could come up with an interesting answer," the redditor noted that the topic was something that most of us could deeply relate to.

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    The reality is that we all have some knowledge blindspots. There are gaps in our knowledge that we’re not even aware of. These can range from misconceptions about common sense things to false interpretations of more complex situations.

    The best that any of us can do is to keep an open mind when we come across information that runs counter to our experiences. This means being humble enough to recognize that nobody is perfect, that everyone makes mistakes, and that we might be wrong in some cases. Scientific knowledge is rarely ever stagnant for long.

    #13

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward That your permanent record really does follow You for Life a bunch of Bologna

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    Noproblem
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    “I hope you know that this will go down on your permanent record.”

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    #14

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward Nerves can’t regenerate and electron orbitals are circles. Basically, science keeps getting better and I had no idea these had changed for a long time.

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    David Paterson
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    I get angry that the education system was still teaching Rutherford's plum pudding model of the atom a full hundred years after it ceased to be relevant.

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    #15

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward That you have to do lots of extra curricular activities, sports, and volunteer work just to get into any colleg. Joke's on them. I went to college 10 years after high school so none of it mattered.

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    Glenn Cuneo
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    I went to a boys and girls college (A nod to Forest Gump) after I retired from the military. Lots of things to fill out on the school application. I just wrote "Nope, not doing this section- it was 30 years ago"

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    However, being open-minded does not mean being naive. This doesn’t mean accepting any and every piece of information that comes your way.

    As one study from 2021 pointed out, people tend to think that repeated information is more truthful than new information. This is known as the illusory truth effect. To put it simply, the more often we hear a claim, the more we think that it’s true. This means that all people, no matter how educated, can fall prey to everything from fake news to advertisement campaigns.

    #16

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward That microwaves kill all the nutrients in food.

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    Bored Fox
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Does anyone know where this myth started? I heard it was some chef who was trying to get people in his restaurant. :D

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    #17

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward A lot of things that we learned about dinosaurs when I was in elementary school turned out to be wrong. We thought they were scaly and reptilian, turns out a lot of them had feathers, and were very brightly colored, and were more like birds in a lot of ways than reptiles. Dinosaurs we thought existed like brontosaurus, turned out to not have actually existed. 

    Just everything dinosaur. Everything dinosaur was wrong.

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    Jeannette Treusch
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Of course the brontosaurus existed. It was thought to have been a taxonomic synonym of its close relative Apatosaurus, but a 2015 study by Emmanuel Tschopp and colleagues found it to be distinct.

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    #18

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward That the English language has comprehensive and consistent rules.

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    What facts from your own school days have you seen get disproven within your lifetimes, dear Pandas? Is there any information from your lessons and lectures that you personally find hard to let go of even when you know it has been updated? We’d like to hear what you think—tell us about it in the comments.

    #19

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward Just about everything they taught about nutrition was a lie... which is kinda insane when you think about it. An entire generation who doesn't know how food works in your body

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    Ace
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Not "an entire generation" but an entire population. There's still a lot we don't fully understand.

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    #20

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward Basically any idea promoted by the D.A.R.E campaign

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    Ovata Acronicta
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    I'm curious if anyone had to get together as a class and sing any DARE songs. I still remember the one we did. No amount of drugs has allowed me to forget! but then I mostly just stick to those rx'd to me.

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    #21

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward Blood is blue until it is oxidized

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    PFD
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Did anyone actually learn this from teachers or textbooks? I've heard it referenced as being a myth for decades but never heard anyone actually repeat the myth as a fact.

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    #23

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward 1970's elementary school - Global Cooling was in process. We would be out of oil by the end of the 80's

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    CP
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    The global cooling c**p was never a real thing. It took on a life of it's own far after the fact because of global warming deniers. Science never took that seriously. https://journals.ametsoc.org/downloadpdf/journals/bams/89/9/2008bams2370_1.pdf

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    #24

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward Cracking your knuckles will cause arthritis, plus basically everything in history class.

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    Mavis
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    "basically everything in history class" ? Everything??!! You must have gone to a really c**p school.

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    #25

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward Eating fat causes you to get fat.

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    Ken Beattie
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Ugh, I hate when this one is brought up because they're trying to oversimplify it. It sounds like they're trying to say you can eat fat and NOT get fat, which is not the case. Fat still has calories (and lots of them). Eat too many calories and you'll get fat, doesn't matter what group (fat, carb or protein) they come from.

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    #26

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward Earth had 4 oceans.

    The 5th ocean plot twist was revealed to me in my late 30s. I didn’t know, guys!!

    Could someone please update Gen X when this stuff happens? There should at least be a weekly memo or something. We are all over here failing easy trivia questions because no one told us that there was a 5th damn ocean. 🤣

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    M Calad
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    I learned in school that the earth had 5 continents. America was seen as one continent comprising of north, central and south america, Australia and all the islands made Oceania, and Antartica was not considered a continent. When my daughter started school, I learned from her now they teach that there are 7 continents! And Oceania no longer exists, it's called Australia.

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    #28

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward That breast feeding was a form of contraception

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    Patsy Robins
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    This!!! It works for many women but not all. I always, always tell my postnatal women not to depend on it, & when they say they’re never having sex again (news flash- people DO have sex again after childbirth, and often sooner than they think!) I ask them how unhappy they’re going to be to discover they’re pregnant again at their six week check?

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    #29

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward That by 1999 all the landfills would be full and we would have to use the Grand Canyon and valleys for our garbage

    ToddHLaew , Leonid Danilov / pexels Report

    #30

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward That 98% of our genes are unused, a throwback of evolution.

    ArachnidGuilty218 , Martin Lopez / pexels Report

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    #31

    Every plate I eat should be MAJORITY pasta, rice, bread or some other kind of carb. The rest should be split between dairy, meat and vegetables equally.

    According-Goal5204 Report

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    Surenu
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    I do this solely to stretch out my more expensive ingredients as much as possible because I'm poor.

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    #32

    "Junk DNA has no function" frustrated me to no end. It turns out it was never "junk". It is actually extremely important to tell the rest of the DNA how to be expressed, and it has played a pivotal role in the evolutive process.

    I alway remember my high school teacher insisting that it was only useful for paternity testing, despite it having already been more thoroughly studied by then.

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    #33

    That I really need to know why the author made red doors in his book.

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    Donkey boi
    Community Member
    10 months ago (edited) DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    To annoy Mick Jagger, who just loved black doors and hated red doors. Every time he saw a red door he wanted to paint them black.

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    #34

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward Mendelian genetics: Eye colour depends on one gene, brown (dominant) and blue (recessive), the rest (grey, green, etc.) is just what happens in the uterus. While this mostly works, multiple genes are playing together. And two blue-eyed parents may still have brown eyed children. 

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    David Paterson
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Many years ago there was a medical study of inheritance. It was found that in a startlingly high percentage of cases, the claimed parentage of children was not the actual parentage. Blue-eyed parents can have a brown-eyed child, but the genetic chance of that is very small.

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    #35

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward "There's no such thing as negative numbers. You can't take 3 apples away from 2 apples."

    Mrs. Adams, my third grade teacher. I don't know what other lies she taught me that I still believe today, but the idea of it pisses me off.

    Snoo-35252 , Katerina Holmes / pexels Report

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    Natasha Arruda
    Community Member
    10 months ago (edited) DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Well, she's right, you can't take 3 apples away from 2, but unfortunately math is not just apples. It's often bananas.

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    #36

    How dinosaurs looked and behaved has since been reworked and to be honest it's strange it took so long for anyone to think "wait what if they had fat, feathers and hair like most other animals?"

    That the neanderthals were ancestors of humans like homo erectus

    That dogs were tamed by the humans (I don't even know if that was even thought to be right back then)

    That the vikings were the first to settle on the americas

    MrSparr0w Report

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    Wingsofwrath
    Community Member
    10 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Tbh, the Norse were the first europeans to settle in the Americas (more specifically in Newfoundland, at L'Anse aux Meadows), because the earliar humans who settled there came from Asia over the Bering Land Bridge. And even then there is some indication of earlier visitation of the Americas by a sixth century Irish monk called Brendan of Clonfert (aka St. Brendan the Navigator) who, along with sixteen companions, set off westward in a leather boat called a "currach" to find the Garden of Eden and might have ended up on the Canadian coast. Their voyage was later reenacted in the 1970s by famed navigator and explorer Tim Severin who showed that it was possible.

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    #37

    30 Facts People Learned In School That Are Now Disproven Because Science Moved Forward That your heart has a finite number of beats. Once it reaches that number, you die.

    Kwarktaart27 , Anna Shvets / pexels Report