Question

Why cant we see infrared rays while most of the animals can?

Answer 1

bcz animals have maximum cone cell where as human beings have minimum cones cells

Answer 2

We cannot preclude such possibilities but it is not reasonable to assume they exist as a visual sense in any living from on earth. Radio waves/microwaves etc. have too large of a wavelength to resolve an image while X rays and gamma rays are too rare in natural environment to provide any benefit that would encourage an evolutionary step of sensing such signals.

Hope it helps you....