35 Interesting Facts People Learned In School That Science Has Since Disproven

Remember sitting in class, wide-eyed, soaking up every interesting fact your teacher said, convinced that these nuggets of wisdom would be eternally irrefutable? Well, hold onto your textbooks, because a stroll down this educational memory lane is about to get bumpy.

A recent viral Reddit thread has become a fascinating time capsule, revealing a collection of “facts” once heralded as the pinnacle of scientific truth, only to be debunked by the relentless march of progress and research. From the dietary pyramid that now seems more like a game of nutritional Jenga, to the Pluto planetary demotion that broke hearts worldwide, this compilation will have you questioning everything you thought was set in stone.

Prepare to have your mind blown as we explore the whimsical world of outdated facts, proving once again that learning is a never-ending journey.


astarisaslave,cottonbro studio / pexels

“High school’s gonna be the best four years of your life!”

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


Heximalus,Karolina Grabowska / pexels

“You won’t have a calculator everywhere you go.”


DntQuitYaDayJOB,energepic.com / pexels

Trickle down economics.


Steven_Dj,RDNE Stock project / pexels

“If you learn well, you’ll get a good job and will have a nice future.” Total BS.


drifters74,bigbrand . / flickr

The food pyramid.


tlf555,Los Muertos Crew / pexels

Grade school in the US, mid 1970s: We will be converting to the metric system soon.


Canadianingermany,Mike R / Wikipedia

Animals don’t use tools.


prosperosniece,Pavel Danilyuk / pexels

Areas of taste on the human tongue. 


Acrobatic_Sport_4580,osseous / flickr

Microwaves kill the nutrients in food.


dasaigaijin,Jessica Lewis 🦋 thepaintedsquare / pexels

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.


Ambitious-Try-3289,Mike Bowler / flickr

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.


confessionofanartist,cottonbro studio / pexels

That your permanent record really does follow you for life a bunch of bologna.


Accomplished-Bad-481,RF._.studio / pexels

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.


OutOfBody88,Monstera Production / pexels

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.


pigtailrose2,Juan Pablo Serrano Arenas / pexels

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.


greeneyes826,Mary Taylor / pexels

That you have to do lots of extra curricular activities, sports, and volunteer work just to get into any college. Joke’s on them. I went to college 10 years after high school so none of it mattered.


FafnerTheBear,Ivan Samkov / pexels

That the English language has comprehensive and consistent rules.


RredditAcct,Istiaque Hossain / pexels

Gen X here.

We’ll run out of oil by 2000.


Elvisruth,Guillaume Falco / pexels

1970’s elementary school – Global Cooling was in process. We would be out of oil by the end of the 80’s.


Mort332e,Jay Reed / flickr

Basically any idea promoted by the D.A.R.E campaign.


TheKiwiQueen,NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute/Alex Parker

Pluto being a planet.


That Christopher Columbus discovered America. Just ask native Americans about this one. – Hungry-Performer-363


27Jarvis,Kellie Churchman / pexels

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.


Blue-Cuboid-Thing,Karolina Grabowska / pexels

Blood is blue until it’s oxidized.


ArachnidGuilty218,Martin Lopez / pexels

That 98% of our genes are unused, a throwback of evolution.


NateThePhotographer,Houcine Ncib / unsplash

I before E except after C.


DMIDY,Towfiqu barbhuiya / pexels

Eating fat causes you to get fat.


DanOfAllTrades80,Eren Li / pexels

Cracking your knuckles will cause arthritis, plus basically everything in history class.


ToddHLaew,Leonid Danilov / pexels

That by 1999 all the landfills would be full and we would have to use the Grand Canyon and valleys for our garbage.


alchemicalqueen,MART PRODUCTION / pexels

Breastfeeding is a form of contraception. 


That I really need to know why the author made red doors in his book. – Capital_Bluebird_185


“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. – VertigoDelight


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


Ok-Painting4168,Pixabay / pexels

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. 


Snoo-35252,Katerina Holmes / pexels

“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.


Mike Primavera

Mike Primavera is a Chicago-based comedy writer even though he doesn't HAVE to work. He lives comfortably off of his family's pasta fortune. Follow him on all social media at @primawesome