First, birds, bees, whales and turtles all use the earth s magnetic field to guide their behaviour. Now scientists have learned much more about how. Joining us is Andres Vidal Gadea. He s a professor of Molecular Neuroethology at Illinois State University who has made the fascinating discoveries. [ dur: 17mins. ] * Andrew Vidal Gadea, Molecular Neuroethology, Illinois State University . His research website at Illinois State University https://about.illinoisstate.edu/avidal/Pages/AGVG_Res.aspx Human history has been drastically changed by our relationship with animals. So much so that our next guest says it would be a different world if not for our intimate bonds with animals. How have they changed us and the world we live in? Joining us is Professor Brian Fagan. [ dur: 41 mins. ] * Brian Fagan, Professor Emeritus of Archaeology, University of California, Santa Barbara. He has authored more than two dozen books, including the latest. "The Intimate Bond: How Animals Have Shaped Human History". Find books authored by our guest scholars on this Book Shelf . This program is produced with generous contribution from Ankine Aghassian, Melissa Chiprin, Tim Page, Mike Hurst and Sudd Dongre.