From creating the atmosphere that led to life on Earth, to providing food for the entire ocean food web, plankton have been pivotal to the world we know today. Indeed, by absorbing vast quantities of carbon dioxide, they have been protecting us from the worst effects of global warming. But do plankton get the credit they deserve..? Find out from guests Prof Paul Tett and Dr Callum Whyte why plankton are the planet's hidden heroes and why we don't know enough about them. What is the ocean rea...