Quicksand used to be a common plot device in adventure films, with people inadvertently stepping into it and being slowly sucked under while others were helpless to extricate them. But it turns out that what is more likely to happen is that as long as you don’t thrash around, you will sink about halfway and stop. But getting yourself out is not easy and requires considerable force. This is what a paper in the 29 September 2005 issue of Nature (vol. 437, p. 635) says.
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