In this edition of The Naked Scientists: Will - and could - India switch off the water supply to Pakistan amid mounting tensions over Kashmir? Also, how a transmissible canine cancer from 8000 years ago is shedding fresh light on tumour biology - and how cancers can steal foreign genes, today. And, testing out a virtual reality tool designed to help us confront our fears of speaking in public... Like this podcast? Please help us by supporting the Naked Scientists