This week, Jillian has a lot of questions for theoretical physicist and mathematician Brian Greene:l Is the universe infinite? What is the most probable multiverse? Are there copies of us out there? What about the Fermi Paradox, are we alone? They tackle some of Jillian's other favorite topics as well, including parallel universes, The Double Slit Experiment, Quantum Mechanics, the nature of time, free will, alternate realities, black holes and so much more… Guest Link:https://www.worldsciencefestival.comStart your FREE 7 day trial for Jillian’s App at https://go.jillianmichaels.com/WNt1rL7uyZSend us your brief question at jillianpodcast@gmail.comFollow us on Instagram @JillianMichaels and @MartiniCindyThis Week’s Sponsors:TRUNIAGEN.com, promo code JILLIAN for $20 off a 3-month supplySKILLSHARE.com/JILLIAN, for a free trial of Premium MembershipBROOKLINEN.com, promo code JILLIAN for $25 off orders over $100, + free shippingTHIRDLOVE.com/JILLIAN for 20% off your first orderYou can find new episodes of Keeping It Real: Conversations with Jillian Michaels, completely ad free, on Wondery+ https://wondery.app.link/jillianSee Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.