Space Madness Podcast Episode 78: Dr. Nick Castle and the Mysteries of Mars

Earth has continents, plate tectonics and water. The Moon has a thick crust and almost no water. Mars has had water but no granite and no plate tectonics. Something is missing from the textbook story, and meteoriticist Dr. Nicholas Castle explains what.Host Jeff Nosanov talks with Nick, a geologist who studies meteorites and works on the Mars Curiosity Rover team. Nick argues that the three best-studied rocky worlds in our neighborhood break the rules we thought we knew. One famous paper on Earth's origins is titled "No Water, No Granites, No Oceans, No Continents." Then the Moon and Mars show up and complicate it.