Bowhead whales travel thousands of miles every spring to feed on the rich plankton concentrations of Disko Bay, West Greenland. But why do the plankton concentrate there, and what does Arctic ice melt mean for their future?

Dr Neil Banas of Strathclyde University traces the story – from old Norwegian accounts to emerging methods in computer modelling, deep into the microscopic realm and its physical underpinnings, and large-scale ocean circulation.

You can watch this free event from here, through the YouTube link below, or if you’d like to join questions and discussion, you can also go to the Science Festival’s YouTube channel