NASA, the National Aeronautics and Space Administration, has over 20 years of data on sea level rise in the oceans of the world. They give regular public updates and you will hear from four of their scientists who reported in a teleconference on August 26, 2015: Michael Freilich, director of NASA's Earth Science Division; Steve Nerem, lead for NASA's Sea Level Change Team at the University of Colorado at Boulder; Eric Rignot, glaciologist at the University of California, Irvine and JPL, Jet Propulsion Laboratory in Pasadena, CA; and Josh Willis, oceanographer at NASA's Jet Propulsion Laboratory in Pasadena, CA. Produced by TUC Radio.