Human migration is in the headlines again – India and Australia have announced a new migration deal, in the US a Covid-inspired policy that allowed migrants to be quickly expelled has come to an end, and in the UK new measures were announced to stop foreign students bringing families with them, in a bid to reduce migration figures. But what does science tell us about migration? With a team across three continents, we’re looking at the origins of human migration and exploring some of the greatest migrations in the animal kingdom. We discover that migrating birds are more like migrating humans than you might think, and learn how even the ground beneath our feet is trying to move somewhere else. We’re also introduced to the real life people labelling images that inform the algorithms behind AI, a researcher with a wall of wind makes a bid for The Coolest Science in the World, we find out why tiles are colder than carpets and we dig deeper into the news that a company founded by Elon Musk has been given the go-ahead to trial a ‘brain-machine interface’. Presenter: Marnie Chesterton Producers: Margaret Sessa Hawkins & Ben Motley