Lawrence Krauss (U.S)
Dr Krauss is an international renowned theorectical physicist. He is Foundation Professor at the School of Earth and Space Exploration and Physics Dept., Co-director, Cosmology Initiative and Director, Origins initiative at Arizona State university. He was visiting Australia to speak at the Atheist Convention in Melbourne.
Uthman Badar (Australia)
Uthman is a Muslim activist and public speaker based in Sydney. His areas of expertise and theology, logic, jurisprudence, politics, and economics. He is currently at the University of Western Sydney completing a PhD, and has engaged in many debates and discussion forums with advocates of atheist and secular ideology.
Full debate on Youtube: http://youtu.be/3YKrLab0IWg