* [http://www.bbc.co.uk/programmes/b06c06nd In Our Time: Perpetual Motion], BBC discussion about the Laws, with Ruth Gregory, Frank Close and Steven Bramwell, hosted by Melvyn Bragg, first broadcast 24 September 2015. | * [http://www.bbc.co.uk/programmes/b06c06nd In Our Time: Perpetual Motion], BBC discussion about the Laws, with Ruth Gregory, Frank Close and Steven Bramwell, hosted by Melvyn Bragg, first broadcast 24 September 2015. |