Most of us knows that everyone has different fingerprint and eye retina and that’s why we have bio-metric to detect individual’s identity. But similarly, we have another fact that our tongue print is also different from each other’s tongue print.
Texture, length, color, fine lines, wrinkles on tongue makes a different tongue print.
So apart from fingerprints, eye retina we have one another unique identity that is our tongue print.
Image Credit : http://www.thefactspeak.com/wpcontent/uploads/2015/05/tongueprint.png
Jyoti 