Paul Ekman is often called “the human lie detector,” and he’s considered the world’s deception detection expert.He’s the inspiration behind the hit series Lie to Me, and he consulted on the movie Inside Out. He’s also trained organizations, such as police departments and the TSA, on how to tell when someone is lying. TIME Magazine named him one of the 100 most influential people in the world. He’s also been ranked fifteenth among the most influential psychologists of the 21st century.Some of the things he talks about today are why people lie, the biggest myths we believe about detecting lies, and how you can actually tell if someone is being deceptive.