He's been a weatherman, ditch-digger and car mechanic as well as Australia's best known science communicator, online, on radio and on TV. He's also the winner of an Ig Nobel Prize for his work on belly button fluff. You'll hear how he chooses jobs, why he believes understranding science is key to understanding the world and how Australia can help fight climate change.

How to tackle climate change
50:44

How playing with Lego can improve productivity
44:36

How surfers or anyone can tackle climate change
44:27