A new study has revealed that islands in the Scottish Hebrides may be the only place on Earth to have a detailed record of how the Earth entered a deep Ice Age hundreds of millions of years ago — and how the thaw which followed led to the emergence of the first animal life. The World’s Host Marco Werman speaks with Elias Rugen, a PhD student at University College, London, and lead author of the study out this week in the Journal of the Geological Society of London, about the discovery.