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 source: Javier Martínez
#2

Image source: Troy Chambers
#3

Image source: Fiki Towfiq
#4

Image source: Tim Brade
#5

Image source: Tobin Hale
#6

Image source: Sam Remnant
#7

Image source: Zick Soh
#8

Image source: Eymen Üçışık-Keser
#9

Image source: Asif Mohammed
#10

Image source: Francisco Salgado Suarez
#11

Image source: Josepha Philippa
#12

Image source: Mike Moore
#13

Image source: Michaela Nocke
#14

Image source: Amanda Church
#15

Image source: Eva Murphy
#16

Image source: Clancy Xanecrest
#17

Image source: Marina Klemm
#18

Image source: Pedro Waffle Fajardo
#19

Image source: Noah Adams
#20

Image source: Eoin Maloney
#21

Image source: Justus Bradshaw
#22

Image source: Jón Ragnarsson
#23

Image source: Tom Chalmers
#24

Image source: Jade Watson
#25

Image source: Sophie Barimo
#26

Image source: Sarah Deuel Baldwin
#27

Image source: Sarah Kashdan
#28

Image source: Kyle Burnett
#29

Image source: Mark Ordonio
#30

Image source: Zick Soh
#31

Image source: Alexander Tamo
#32

Image source: Tomás Lamar González
#33

Image source: Olivia Fitzsalmonsteinbertine
#34

Image source: Soumyadeep Naskar
#35

Image source: Ann Taylor
#36

Image source: Mauricio Jaramillo
#37

Image source: Ethan Smoller
#38

Image source: Shristi Dutt
#39

Image source: Julia Brown
#40

Image source: Dylan Vogel
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