Lie-Detector

John A Larson, a medical student from California University developed a machine in 1921 which can detect lies with a fair degrees of accuracy. This machine is know as ‘Polygraph’ or a Lie Detector. In 1927, the American inventor Allan Bell another improved model of a Lie Detector which was able to detect slight tremblings in the voice which often occur when a person tells a lie….. [… More info ..]