ENCORE Archaeologists continue to hunt for the city of Atlantis, even though it may never have existed. But, what if it did? Its discovery would change ancient history. Sometimes when we dig around in the past, we can change our understanding of how we got to where we are. We thought we had wrapped up the death of the dinosaurs: blame it on an asteroid. But evidence unearthed in Antarctica and elsewhere suggests the rock from space wasn’t the sole culprit. Also, digging into our genetic past can turn up surprising – and sometimes uncomfortable truths – from ancestral origins to genes that code for disease. But do we always want to know? Guests: •   Mark Adams – author, Meet Me in Atlantis: My Obsessive Quest to Find the Sunken City •   David Morrison – Senior scientist, NASA Ames Research Center •   Peter Ward – Paleontologist, University of Washington, author of A New History of Life: The Radical New Discoveries about the Origins and Evolution of Life on Earth •   Christine Kenneally – Journalist and author of The Invisible History of the Human Race: How DNA and History Shape Our Identities and Our Futures