April 30th, 2015
Episode 455 of 515 episodes
The Earth's inner core is an extremely dense, solid ball of iron and nickel, while the outer core is a flowing liquid. Life on Earth is possible thanks to the magnetic fields produced by the core which protect the Earth from dangerous cosmic rays from space. The precise structure of the core and its properties have fascinated scientists since the Renaissance. Recent research shows the picture is even more complex than we might have imagined, with suggestions that the core is spinning at a different speed from the surface. Melvyn Bragg is joined by Stephen Blundell, Professor of Physics and Fellow of Mansfield College at the University of Oxford; Arwen Deuss, Associate Professor in Seismology at Utrecht University and Simon Redfern, Professor of Mineral Physics at the University of Cambridge.
Have you trembled ‘round the campfire as the ghost stories are told? Do tales of horrors wrought by nature and beyond strike fear in your soul? Is it best when you are afraid to turn out the light? Thrill to stories that strike at your deepest fears, as host Stephen Kilpatrick brings the best of horror fiction to your ears and your mind, read to you by the most chilling narrators that podcasting has to offer. <br /> <br /> Podcasting the finest in genre fiction, Tales to Terrify is where the depths of horror reveal the truths of good, evil, and the human spirit in the District of Wonders podcast network. Like all shows in the District of Wonders, Tales to Terrify is supported by a welcoming community of dedicated fans and contributors. Subscribe today, and begin your journey through the spine-tingling depths of storytelling.<br /> <br /> Everyone has a story in the District of Wonders. Come and find yours.