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Vast swathes of Europe and Asia are experiencing drought conditions, thanks to relentless heatwaves and lack of rain. This week, we find out why drought conditions could unexpectedly lead to an increase in water-borne disease. Next up, we take a trip to Lake Malawi to discover why a tiny fly could help us rewrite the science of insects. Also on the show, we’re joined by Professor Dan Parsons from Loughborough University in the UK, who tells us about the rivers that lurk beneath the sea. Elsewhere, we hear about the tech that could help reduce textile waste, we find out why rehydrating raisins won’t turn them back into grapes, and discover how to suck water from thin air. All that, plus many more Unexpected Elements. Presenter: Marnie Chesterton, with Chhavi Sachdev and Phillys Mwatee Producers: Alice Lipscombe-Southwell, with Debbie Kilbride and Imy Harper