Dr Natalie Warburton is Associate Professor of Anatomy at Murdoch University and Dr Aaron Camens Lectures in Palaeontology at Flinders University. We discuss marsupial evolution from marsupial moles to extinct tree dwelling kangaroos from the Nullarbor Plains.  Marsupial Mole. Image credit:...

Mark Smith holds a senior position at Adelaide Zoo and is a world-renowned shark and ray expert and the co-author of Elasmobranch Husbandry Manual: Captive Care of Sharks, Rays, and their Relatives.