In the final episode of this season, we hear from a NASA researcher whose expertise spans from studying samples in deep, untouched regions of our planet all the way to organic chemistry happening in space. We consider the possibility of other, past origins of life on Earth and look at the rich potential to learn from sample return missions, including the recent OSIRIS-REx mission that retrieved samples of the asteroid Bennu. Abha also sits down with Chris to hear his perspective on the podcast as a researcher who's collaborated with this season's guests on diverse research.