Edition 783 - Beatriz Villaroel

Swedish Astrophysicist Beatriz Villaroel at Stockholm University has been researching a phenomenon from before our space-age – Do astronomers' observational photographic plates from the 1950s show artificial space objects appearing then vanishing? And do those objects appear to coincide with famous recorded “UFO events? We also talk about the search for alien artefacts - and where you'd start to look.