When scuba divers go deep, it can take a full day to resurface. Caller Daniela wants to know: how do they drink, eat and excrete while underwater? Fish biologist Richard Pyle gives us the lowdown on deep diving. Plus, saturation diver Michael Meusel lives in an underwater chamber for a month at a time for his job. He tells us about the challenges of deep sea work, like hammering underwater and breathing helium-laced air.
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