Mexican Lance-headed Rattlesnake (Crotalus polystictus)

Mexican Lance-headed Rattlesnake (Crotalus polystictus)_2

The two tips of a snake’s tongue allows them them to determine directionality of chemical traces. One would presume that snakes only need two probes because they are, largely, two dimensional beings and that, could snakes fly, they would be equipped with a triple split tongue. However, sea snakes exist in a three dimensional world and only have the normal split tongue.

This just goes to show that nature does what works, not what fits human theories.