We had a great time filming this last spring, CBBC operation ouch, with Dr Chris & Dr Xand and Georgina Miller, discussing the mammalian dive reflex. This is a great show, we love it! We are on just after the section on why your poop is brown, about 21 minutes in. Brilliant! Beautiful underwater footage by Daan Verhoeven, at Porthkerris Divers and the boat expertly skippered by Dave Zoltan Brown.

See the full episode on I-player here

Or our video clip here