Kenneth wrote:
> I wonder why WE can't see into the ultraviolet (and the infrared?) That
> SCIENTIFIC AMERICAN article points out that some existing creatures can see at
> least somewhat into the UV spectrum. So their retinas(?) must have developed
> some kind of protection that we don't (currently!) have. "Man is the superior
> being.": Bah, humbug.

Well, they can detect UVA, yes, which is mostly harmless. It's UVB that 
causes burns and cancer.

And some people can see just barely into the IR band. I'm one that on 
certain IR remotes, I can just barely see the die light up. It's 
probably very long wave red that I'm actually seeing, though.


-- 
~Mike

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