Found on the faces of species like pit vipers, these organs let snakes detect warm-blooded prey, even in the dark. They can "see" like a thermal camera. These transparent scales, or spectacles ...

In a 6ft (1.83m) long specimen they measured 2in (50mm). Snakes don’t blink as they have transparent eyelids that are fused shut. When they shed their skin they also shed these eye coverings ...