According to the pop icon Madonna, music makes the people come together. But can we prove that using science? As Madonna embarks on her greatest hits world tour, the Unexpected Elements team on three continents take some of those hits and examine the science behind them. Like a Virgin take us on an excursion into parthenogenesis, and the Komodo Dragons that can reproduce without the inconvenience of having to find a mate. Madonna sung about travelling ‘quicker than a ray of light’, but is that actually possible? We take a very fast trip through the strange world of warp bubbles. And we Get Into the Groove with the physicist who created a record so tiny it fits into one of the grooves of a normal record. We also hear about the “find your ancestry” kits that have the capacity to solve so-called cold cases, identifying unknown human remains often decades old. With the eyes of the world on events in Gaza, we discover how tech can help make sure that any reportage – video or photos – are accurate and not doctored. All that plus your emails and WhatsApps, and a listener wonders whether fish can drown. Presented by Marnie Chesterton, with Philistiah Mwatee and Katie Silver Produced by Ben Motley, with Alex Mansfield, Tom Bonnett, Sophie Ormiston and Margaret Sessa Hawkins