Episode 432 - Using sound and magnetism to navigate the world

How do animals use different senses to navigate the world? Can sharks detect magnetic fields? How do sharks travel 20,000km so precisely?  Can sharks use the Earth's magnetic field to navigate? What creatures use magnetism and how do they do it? Bats use echolocation, but what if the speed of sound changes? What if everything moved at 1.25 x speed? How can bats adapt to changes in the speed of sound? Bryan A. Keller, Nathan F. Putman, R. Dean Grubbs, David S. Portnoy, Timothy P. Murphy. Map-like use of Earth’s magnetic field in sharks. Current Biology, 2021; DOI: 10.1016/j.cub.2021.03.103 Eran Amichai, Yossi Yovel. Echolocating bats rely on an innate speed-of-sound reference. Proceedings of the National Academy of Sciences, 2021; 118 (19): e2024352118 DOI: 10.1073/pnas.2024352118