Mysterious sky flashes linked to 1950s nuclear tests? Inside the VASCO Project

Astronomer Beatriz Villarroel joins ChicagoNOW to discuss the VASCO Project — Vanishing and Appearing Sources during a Century of Observations — which searches digitized sky records for mysterious changes in the heavens. The team has discovered thousands of unexplained light flashes on 1950s photographic plates, some correlating with nuclear tests and UFO witness reports.