Today, billions of people adhere to one of the “Big Five” major religions, but there are many more religions from history that have died out. Conquests, cultural change and conversions have all caused religions to shift, shrink and disappear. But when can we truly declare a religion “dead”? And could the religions of today die out in the distant future?  Guests:   Aslan Pahari, Video presenter/producer, ABC Digital Content and Innovation  Adam Bowles, Associate Professor in Asian Religions at the University of Queensland  Carole Cusak, Professor of Religious Studies at the University of Sydney