Is There a Way to Tell When Someone Is Lying?

Thermographic cameras have shown that people's noses grow warmer when they
lie.

Judges, defense attorneys, wronged spouses and suspicious parents would
love to be able to definitively know if a certain person is lying. The
polygraph, or lie detector, is one machine that purports to tell testers
whether the test subject is lying or not. However, depending on whom you
ask, the machine's accuracy ranges from about 70 to 90 percent, which is
why polygraph results are rarely admissible in court. However, as we
learned from Pinocchio, an individual's nose may hold the key to whether he
or she is speaking the truth.

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