Take the magnificent bald eagle, for example. My wife and I saw dozens of bald eagles on a recent fishing trip to Alaska. To see one of them come swooping down and pluck a live and sizable fish from the water on a single pass is astonishing. More astonishing, still, is the eagle’s eyesight. And because of its need to see from high altitudes small rodents moving in the grass, or a fish just inches under the surface of the water, its incredible eyes take up just about all the space in its head. For the eagle, its eyes are the most important thing, and everything else works in unison with them.
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