How Humans Can See Infrared

December 2, 2014 4:52 AM

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How Humans Can See Infrared

Humans possess a degree of infrared vision, scientists say, and may be able to perceive infrared rays as visible light. That's according to a new study in the Proceedings of the National Academy of Sciences. Prior research had hinted that human vision might not be completely limited to the "visible" portion of the infrared spectrum, but these limited studies did not explain how infrared vision might work.

Scientists led by Krzysztof Palczewski at Case Western Reserve University in Cleveland had noticed during other experiments that they themselves could perceive infrared laser beams as a pale greenish light, prompting them to learn more about human infrared vision. So they began to test the same kind...

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