How To Spot A Liar

According to a new study from the University of California, Berkeley, all it takes is 20 seconds to decide whether or not a stranger is trustworthy.The researchers conducted experiments on 24 couples and then studied their genetic makeups to link observations.
According to this article, inconsistent behaviour, a steady gaze or quickly looking away from the addressee , sudden loss of speech and a quick smile (recognized as fake) are prominent signs of liars. Details of the Californian Research can also be found here.