51:21
How long is a piece of string?
In the spirit of a famous rhetorical question, this program explores the world of scientific measurement at the molecular and atomic level. Host Alan Davies tries to establish the length of a piece of household string—but what appears to be a simp...
51:10
Clinical Impressions: Identifying Mental Illness
How long can mental illness stay hidden, especially from the eyes of trained experts? This program rejoins a group of ten adults—five of them healthy and five of them with histories of mental illness—as psychiatric specialists try to spot and co...