Kevin and Guy were again joined by Dr. Andrew Glikson, Visiting Fellow at Australian National University. Professor Glikson is a renowned geologist who has written widely about previous mass extinction events on Earth. We discussed his forthcoming book, The Event Horizon: Homo Promotheus and the Climate Catastrophe. The book is available from Springer at https://link.springer.com/ chapter/10.1007/978-3-030- 54734-9_4