Brendan sits down with Dr. Priya Natarajan. Dr. Natarajan is a theoretical astrophysicist interested in cosmology, gravitational lensing and black hole physics. In particular, she has focused on making dark matter maps of clusters of galaxies, the largest known repositories of dark matter. Priya recently authored the book Mapping the Heavens: The Radical Scientific Ideas That Reveal the Cosmos. She is also on the scientific advisory board of Nova ScienceNow. Her book can be found on Amazon and her profile can be found at http://www.astro.yale.edu/priya/. Follow her on social media @SheerPriya.  Thanks to Patrons: Rich, Brenda, Rachel for contributing directly to this episode. Consider supporting the show by leaving a rating or a review and subscribing to receive future content. Consider becoming a Patron by donating to the show on Patreon at https://www.patreon.com/thestateoftheuniverse. For more episodes or information about "The State of The Universe with Brendan Drachler" visit thestateoftheuniverse.com or follow Brendan on Twitter and Instagram @BrendanDrachler.  The State of the Universe is an accessible science and social podcast hosted by Astrophysicist Brendan Drachler. Listen to Brendan and other renowned members of society discuss and explain cutting edge research and profound ideas. The music in this episode can be found at https://soundcloud.com/mellowmatix/beatfood?in=basilver/sets/instrumental.