Do we know how the Universe began? Sort of… In this episode of Unknowns, historian David Christian and astrophysicist Orsola de Marco explore what we know about the origins of the Universe and the many questions that remain. Unravel the mysteries of existence, from the birth of the cosmos to the origins of life. Perfect for curious minds seeking big answers! Tune in and explore the unknown. Subscribe to join the journey into the Universe’s greatest mysteries. Click here to learn more about Big History.