ANDREW COLLINS is a science and history writer who has been investigating the origins of human civilization since 1995. He is the codiscoverer of a massive cave complex beneath the Giza plateau, now known as “Collins’ Cave.” The author of several books, including Göbekli Tepe: Genesis of the Gods, he lives in Essex, England. GREGORY L. LITTLE, Ed.D., is the author of more than 30 books, including Denisovan Origins, coauthored with Andrew Collins. His research has been featured on the National Geographic Channel, MSNBC, Discovery, and the History Channel. He lives in Memphis, Tennessee.