Look up! There's an emu in the sky: Duane Hamacher at TEDxNorthernSydneyInstitute 

A trained astrophysicist, Dr Duane Hamacher is a lecturer in the Nura Gili Indigenous Centre at the University of New South Wales. After studying planets orbiting other stars for two years, his interest in the crossroads of science and culture was too great and he decided to complete a PhD in Indigenous Studies at Macquarie University. He researches in how navigating the boundaries between Indigenous Knowledge and Western Science can show how these ways of understanding the natural world are beneficial to both.
In the spirit of ideas worth spreading, TEDx is a program of local, self-organized events that bring people together to share a TED-like experience. At a TEDx event, TEDTalks video and live speakers combine to spark deep discussion and connection in a small group. These local, self-organized events are branded TEDx, where x = independently organized TED event. The TED Conference provides general guidance for the TEDx program, but individual TEDx events are self-organized.* (*Subject to certain rules and regulations)