"Vital signs," like blood pressure and pulse rate, are used in medicine to track human health. Paying attention to the little things can often help us better understand what's going on in the big picture. Scientists can monitor ecological "vital signs," too. In this episode, biologist Andrew Ray shows us that a little creature can tell us a lot about the Yellowstone ecosystem.
Podden och tillhörande omslagsbild på den här sidan tillhör Yellowstone National Park. Innehållet i podden är skapat av Yellowstone National Park och inte av, eller tillsammans med, Poddtoppen.
