My Fuzzy talks to aliens

What are the limits to life? If it does exist elsewhere, what might it be like? Carbon or silicon, two legs or three, and is intelligence really special. Dr Charley Lineweaver returns to Fuzzy for a fascinating discussion on the nature of life. Charley was recently in a documentary on SBS "My Mum Talks to Aliens". He questions the human urge to think we are the pinnacle of evolution. Interview by Rod. 29MB