To understand our role in the universe, we have to explore the cosmos. Astrophysicist and author Dr. Janna Levin guides us in exploring the origins of the cosmos, black holes, string theory, and more! Plus, Dr. Levin answers a question from Hailey, who asks how we can measure a constantly-expanding universe, and from Victoria who\u2019s been wondering if we\u2019re living a holographic universe.\n\nYou can listen to ad-free new episodes of Science Rules!, only on Stitcher Premium. For a free month of Stitcher Premium, go to\xa0stitcherpremium.com\xa0and use promo code \u2018SCIENCE.'