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What is a lie detector and how does it work?

John A. Larson, a medical student from California University developed a machine in 1921 which can detect lies with a fair degree of accuracy. This machine is known as polygraph or a lie-detector. In 1972, the American inventor Allan Bell developed... Read More

General Science Quiz - Multiple Choice Questions with Answers

Here are some general science quiz questions along with answers to increase your general knowledge about science. General Science Quiz Questions Which instrument is used to measure pressure? Saccharimeter Ammeter Manometer Lactometer ... Read More