Why have sharks been so successful? With Dr James Lea

It's our 50th episode!! To celebrate, host Isla is joined by shark scientist and CEO of the Save Our Seas Foundation Dr James Lea to talk about the amazing evolutionary success of sharks and their relatives. We talk about just how much sharks have had thrown at them over the 440 million years they've existed on this planet (super volcanoes, ice ages, the terror of plants and a mass extinction event called the 'Great Dying'!) and discuss their super-powered adaptations and efficient body plans. Plus, we answer a listener question: how can I get my friends into shark conservation?  Shownotes: www.saveourseas.com/worldofsharks/podcast  You can find us on instagram (@saveourseasfoundation) and twitter (@SaveOurSeas).