Rally Driving, Flying, Coral, Torpedoes, Hollywood

The list may seem strange, but it applies to our two featured women. Dorothy Hill was a pioneering Australian scientist who's field was coral paleantology. She also drove rally cars and had a pilot's license.  Hedy Lamarr was a renowned Hollywood beauty. She invented secure frequency hopping radio transmission. Something like it is in your mobile phone. We look at a surprisingly simple way to make renewable energy reliable on the grid. And in today's Ask Fuzzy we learn about arthritis. Brought to you by Rebecca Kaye from National Science Week, with Rod.