EnvironmentIt Takes A River: A 135-Mile Journey Down The ColoradoSeptember 21, 2016 | Amy QuintonEach spring, a group of UC Davis student scientists and their professors take a whitewater rafting trip through the Grand Canyon to study a river that sustains 40 million people. Capital Public Radio’s Amy Quinton traveled with them. Listen /Update RequiredTo play audio, update browser or Flash plugin.