How does a lie detector work? Lie detectors work on the principle that anyone who’s lying will be nervous, and nervous people tend to produce more adrenaline, which makes their hearts beat faster, ...

LIE detector tests have become more and more frequent on TV - with programmes such as The Jeremy Kyle Show and Love Island making use of the devices. But how exactly do polygraph machines work? And ...

In February of 1994, the FBI arrested Aldrich Ames, who had been a CIA employee for 31 years. Ames was arrested and charged with espionage. He was a Russian spy. For nine years, he had been passing ...

LIE detector tests have become more and more frequent on TV – with programmes such as The Jeremy Kyle Show and Love Island making use of the devices. But how exactly do polygraph machines work? And ...