Why are we living longer than our ancestors?

Steven Johnson discusses the Extra Life project, which includes a book and new BBC Four series co-presented with David Olusoga. He chronicles a revolution in medicine, and explores the innovations in science and public health that have led to huge increases in life expectancy since 1900. Hosted on Acast. See acast.com/privacy for more information. Learn more about your ad choices. Visit podcastchoices.com/adchoices