Which Body Parts Can Unlock iPhone 5S?

One of the most talked about features of the new iPhone 5S is the Touch ID fingerprint scanner. Instead of having to type a passcode in, just put your finger on the home button and it unlocks itself

While the high-tech feature was intended for fingers, you can technically program it to recognize anything with a discernible print. So far, it has reportedly works on forearms, nipples and even a cat's paw.

But where does it all end? Where does Apple draw the line on what can and cannot be used to unlock the iPhone?

My name is Paul Laudiero and that's what I set out to discover in the video above. In the name of science (and Harry Potter), I tested the 5S to see which body parts — both human and non-human — would work with the Touch ID. Read more...