Science textbook Memes

Chemistry textbooks are notorious for their dad-joke level of humor. Here we have the literal interpretation of "two moles per liter" - not the concentration unit that measures 6.022 × 10²³ particles per liter, but two actual mole animals crammed into a beaker. This is the kind of visual pun that makes first-year chemistry students groan while their professors chuckle maniacally. The illustrator deserves both a Nobel Prize and immediate termination.