Quicksand -- brrr, horrible stuff. Back in the day you couldn't move in the movies without taking one wrong step and sinking into a sandy grave (unless your pals were on hand with a handy rope or jungle vine). Well, whether you've noticed or not, quicksand has been disappearing from our screens as the handy peril of choice for filmmakers.

How do we know this? Well, in a beautifully researched essay for Slate, Daniel Engber has traced the decline of quicksand in cinema, which reached its peak during the 1960s. Weirdly, the basis for his research started with online quicksand fetish communities.

Give yourself a minute to laugh/drop your jaw/scratch your head in disbelief and then read that again -- yes, there are actual people who get off on the idea of quicksand.
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