The Economist: All Audio
Jul 5, 2017 Zapping the brain with a weak electric current enhances its visual cortex. Is this a way to help squeeze more value out of our grey matter? Also, how a new miniature phone camera is making us rethink every aspect of photography. And why whales have become so good at filtering food. Hal Hodson hosts. See acast.com/privacy for privacy and opt-out information.