Ask Dr. Universe: How many colors can we see?
PULLMAN, Wash. – The human eye can see millions and millions of colors. But believe it or not, some colors exist in our world that the human eye can’t see.
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Ask Dr. Universe: Do spiders have good eyesight?
PULLMAN, Wash. – Most spiders have quite a few eyes, but they usually can’t see very well. Then again, seeing isn’t everything.