07:32DiscoveryScience Stories17/02/2020 GMTBBC World Service Duration: 27 minutes Tue 18th Feb 2020, 07:32 on BBC World Service East and Southern AfricaMary Somerville, pioneer of popular science writing. Show more GenresFactualScience & NatureFormatsMagazines & ReviewsBrandDiscoverySeriesDiscovery: Science Stories Source: BBC Online