For many of us, quicksand was once a real fear — it held a vise grip on our imaginations, from childish sandbox games to grown-up anxieties about venturing into unknown lands. But these days, quicksand can't even scare an 8-year-old. In this short, we try to find out why.  Then-Producer Soren Wheeler introduces us to Dan Engber, writer and columnist for Slate, now with The Atlantic. Dan became obsessed with quicksand after happening upon a strange fact: kids are no longer afraid of it. In this episode, Dan recounts for Soren and Robert Krulwich the story of his obsession. He immersed himself in research, compiled mountains of data, met with quicksand fetishists and, in the end, formulated a theory about why the terror of his childhood seems to have lost its menacing allure. Then Carlton Cuse, who at the time we first aired this episode was best-known as the writer and executive producer of Lost, helps us think about whether giant pits of hero-swallowing mud might one day creep back into the spotlight.And, as this episode first aired in 2013, we can see if we were right.   Episode Credits:Reported and produced by Soren Wheeler Our newsletter comes out every Wednesday. It includes short essays, recommendations, and details about other ways to interact with the show. Sign up (https://radiolab.org/newsletter)! Radiolab is supported by listeners like you. Support Radiolab by becoming a member of The Lab (https://members.radiolab.org/) today. Follow our show on Instagram, Twitter and Facebook @radiolab, and share your thoughts with us by emailing radiolab@wnyc.org.     Leadership support for Radiolab’s science programming is provided by the Gordon and Betty Moore Foundation, Science Sandbox, a Simons Foundation Initiative, and the John Templeton Foundation. Foundational support for Radiolab was provided by the Alfred P. Sloan Foundation.