> Just pondering that evolutionary adaptation is fascinating. I wonder if it came
> about from the fact that we descended from tree-or-forest-dwelling animals,
> where the predominant color was green? Not that the *entire* earth was
> forested, but a good portion of it.  Does it also mean that we humans can now
> see subtle gradations of green better than subtle gradations of red or blue?

The question is... why are leaves green in the first place? Wouldn't 
they work so much better if they were black??

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