David Barrie is a mariner, psychologist, and author. As a Fellow of the Royal Institute of Navigation, Barrie has sailed all over the world. He served in the British Diplomatic Service, then worked in the arts and as a law-reform campaigner. Barrie's first book, "Sextant," was published in 2014. His second book, "Supernavigators: Exploring the Wonders of How Animals Find Their Way," was published in 2019. Barrie received his B.A. in Experimental Psychology and Philosophy from Oxford University.