Aussie Inventions That Changed The World

They say I have a face for podcasts, so you can listen to these little beauties that expand upon some of the stories in Aussie Inventions That Changed The World, a History Channel television program I co-presented, without having to see my homely mug.  You can hear my dulcet tones on episodes 5 (Medicine), 6 (Food Preservation) and 9 (Super Vision).