9 Body Parts as Unique as Your Fingerprint

Ear

Trace the rim of your ear: Feel those curves and ridges? You’re the only person in the world with that exact shape. In one British study, researchers developed an algorithm that could identify a single individual out of more than 250 others with a 99.6 percent accuracy rate by analyzing how light reflects off the curves of the ears. The ear is such a handy identifier that Yahoo is developing technology to unlock smartphones with an ear scanner. Someone receiving a call would unlock the phone by simply pressing it to the ear.

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