Maybe FBI Agent Mulder should have spent more time in microbiology class rather than looking to skies to search for alien life. Extremophile organisms are those that thrive in the coldest, hottest, deepest, saltiest, most acidic parts of the habitable earth. They have been studied by scientists as one of the earliest forms of life on Earth, and are capable of everything from running your digestive system to growing gold in soil. They have even been considered as potential alien hitchhikers as a panspermic arrival on Martian projectile! What does that even mean? Join David, Luke, and expert Professor Gordon Southam from the University of Queensland to find out. Hosted by Dr Luke Nothdurft and Dr David Flannery. Edited by Carol Liang.