Dr. Ross Beyer talks about Pluto's companion, Charon. He describes how he derived a theory explaining how Charon's "wonky" plains formed. He compares being a planetary geologist with a crime scene investigator, and tells us the story about how Charon got its name.
Prof. Christine Hartzell tells us about the bizarre ways dust and rock behave on asteroids. She explains, "asteroids are complicated because our intuition fails." Tools like shovels become useless, forcing spacecraft designers to innovate.