I have no doubt that every one of us has seen something odd in our textbooks—a name, an illustration or a graph that looks just a bit too odd or completely bizarre for it to be in a textbook.

Of course, to us as kids that was comedy gold and we’d go around showing everyone this unique and hilarious discovery. But now… well, yeah, it’s still super funny, but now it also begs the question “what were they thinking!?”

Believe it or not, there’s an entire Facebook group dedicated to sharing with the world the most ridiculous, yet scientifically accurate and true, illustrations and diagrams that people find hard to believe that they managed to make it into a textbook.

Bored Panda has collected some of the best examples for you to enjoy below. And while you’re down there, why not vote and comment on the ones you’ve liked the most!

#1

Image credits: Javier Martínez‎

#2

Image credits: Troy Chambers‎

#3

Image credits: Tim Brade

The Facebook group in question is called Science diagrams that look like s**tposts and is dedicated to sharing proper science illustrations, figures, and graphs from textbooks and other publications whose editors obviously never bothered to check the end product before printing, thus ending in results that are reminiscent of s**tposting—internet slang for creating content of no value.

The group was created by an internaut named Luke who found these diagrams really funny, while admitting he has no idea why—it just was, and we all understand it, though can’t entirely explain it.

#4

Image credits: Fiki Towfiq

#5

Image credits: Tobin Hale

#6

Image credits: Sam Remnant‎

It has over 448,000 members as of this article and even has its own Twitter account with over 500,000 followers. There’s an influx of hundreds of posts each month with members constantly sharing some of the most ridiculous, yet accurate, depictions of all things science.

Shared imagery often involves animals and the natural world, but it’s not just how they depict it, but also what they write. Besides disfigured animals and humans, illustrations that raise more questions than they actually answer, and crappy design in general, there’s also the occasional mislabeling (whether deliberate or not, nobody is truly sure) of illustrations that raise eyebrows at the very least.

#7

Image credits: Zick Soh‎

#8

Image credits: Asif Mohammed

#9

Image credits: Eymen Üçışık-Keser‎

More often than not, these diagrams are taken out of their academic and scientific contexts, making it raise even more eyebrows, though others, even within context, would still look odd making people think how is this scientific because of how they are visually depicted.

It is interesting to think that s**tposting is, in some shape or form, present in the actual scientific community, especially in physics. There is this metaphor of the spherical cow which is a highly simplified model of a complex real-life phenomenon where a problem is reduced to its simplest form so that brainy people could make the calculations more feasible, despite it being no longer applicable in reality. So, some scientists are used to this.

#10

Image credits: Mike Moore

#11

Image credits: Eva Murphy

#12

Image credits: Francisco Salgado Suarez‎

For more hilarious scientific oddities presented in image form on the internet, you can check out the Facebook group or follow their Twitter. Or just keep scrolling! But before you go, let us know what you thought of this. Do you have any stories to share about your textbooks? Leave us a comment below!