If you had to travel 500 miles across country, on foot, with no map, no GPS, without talking to anyone — to a destination you've never seen, could you do it? It sounds impossible, but millions of creatures spend their lives on the move, migrating from one part of the Earth to another with navigation skills we can only dream of. How do they do it — and what can we learn from them? Original Air Date: July 25, 2020 Guests:  Moses Augustino Kumburu — David Wilcove — Stan Temple — David Barrie — Sonia Shah Interviews In This Hour:  The Serengeti's Great Migration, Up Close — Why Do Animals Migrate? — Sandhill Cranes Make The Long Journey South — The Greatest Navigators on the Planet — The High Costs — And Potential Gains — Of Migration, Both Animal And Human