Potty training cows, and sardines swimming into an ecological trap

Online News Editor David Grimm joins host Sarah Crespi to talk about the health and environmental benefits of potty training cows. Next, Peter Teske, a professor in the department of zoology at the University of Johannesburg, joins us to talk about his Science Advances paper on origins of the sardine run—a massive annual fish migration off the coast of South Africa. This week’s episode was produced with help from Podigy.