What is the proof for saying that snakes can sense minute temperature changes?

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Solution

They have special pits located between their eyes and nostrils that can sense minute temperature changes as infrared rays, as an aid in locating warm-blooded prey such as rodents.

Snakes use the radiation to generate 'thermal images' of predators or prey, but the underlying physiology has been unclear.

It is found on the sensory nerve fibres that stimulate the snakes' pit organ, the highly specialised facial structure that initially detects radiant heat and consists of cavities located on each side of the head.

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