There are many ways to detect a heartbeat electronically. One of the simpler ways is to take [Orlando’s] approach. He’s built a finger-mounted pulse detector using a few simple componen… ...

A polygraph is commonly known as a lie detector but it’s really just a machine with a number of sensors that measure things like heart rate, breathing rate, galvanic skin response and blood p… ...

We use our mouths to communicate what we want people to know. But what if our teeth started giving away all of our secrets? That's what could happen with technology being developed by scientists ...

Traditional lie detection depends on the venerable polygraph, first developed in 1921, a much more invasive apparatus with a set of wires attached to the skin. This new device promises non ...