The polygraph or lie detector test has been in use for over 100 years. It has been heralded as a technological marvel that allows investigators to accurately determine when someone is lying and when ...

They feature frequently in real-life murder documentaries and, until 2019 when The Jeremy Kyle Show was taken off air, were a huge focal point for reality TV shows. But what does it feel like to ...

A version of this story appeared in CNN’s What Matters newsletter. To get it in your inbox, sign up for free here. When President Ronald Reagan’s White House threatened thousands of government ...