A new potential ocean found hidden under Pluto's surface. Can using CO2 as a fracturing "fluid" instead of water reduce the environmental impact of hydraulic fracturing? Why are institutions doing away with the GRE? These topics and more in this episode of the Planetary News Radio. Visit on the web at: http://www.iiress.com/planetary/podcasts. Join the discussion on Discord at: https://discord.gg/5HQj8eC. Support on Patreon at: https://www.patreon.com/planetarynews.