Being put on the spot can make you sweat and fumble over your words — how did BTS' Jin fare when he was hooked up to a lie detector machine? In a YouTube video uploaded by Vanity Fair on Wednesday ...

The science behind the lie detector test has been disputed since its creation 90 years ago, so is there any reliable way to tell if someone is lying, asks Dr Geoff Bunn, author of The Truth Machine: A ...