Geraint F. Lewis is Professor of Astrophysics at the Sydney Institute for Astronomy. He has published two popular books on cosmology: A Fortunate Universe: Life in a Finely Tuned Cosmos (2016) and The Cosmic Revolutionary's Handbook: (Or: How to Beat the Big Bang) (2020). His next book, Where Did the Universe Come From? and Other Cosmic Questions: Our Universe, from the Quantum to the Cosmos, will be published in September 2021 and is available for Pre-order now.