Gene and guest cohost Tim Swartz present Mark Olly, author of “Crystal Skulls & Human Heads: The Mystical History of Glass and the Extinction of the World.” In this book, Olly seamlessly combines the disciplines of archaeology, geology, science, and human studies, to push the boundaries of human existence wider in both directions and increase our appreciation of just exactly what the human race could potentially be capable of achieving. For over 22 years, Mark worked as a professional musician, live DJ, compare, and in music management, founding Angelharp Music, Unicorn Entertainments Agency Ltd. and Legendthink Ltd. (one of the first multmedia companies in the world) before moving on to pursue a solo career as a writer, archaeologist and television presenter.