Listener Mail: Gut Tests, Personal Surveillance and Knighstscope

A listener asks about the amazing, terrifying future of gut biome tests. Another audience member reveals first-hand knowledge of just how closely Siri listens to you, and a fellow Conspiracy Realist asks about the future of automated law enforcement. All this and more in this week's listener mail.

They don't want you to read our book.: https://static.macmillan.com/static/fib/stuff-you-should-read/

See omnystudio.com/listener for privacy information.