By putting weird stuff in textbooks, learning can be more “fun” and “relevant” or something.
An illustration of Michael Phelp's father's sperm racing towards his mother's egg.
Source: i.imgur.com
A dick that's actually a man punching another man.
Source: i.imgur.com
A really old computer found in a textbook published in 2010.
Source: i.imgur.com
A hand in a dumpster reaching out in desperation before it's lifted on a 30 degree angle.
Source: i.imgur.com