The evolution of the human eye has long been considered one of biology's more challenging mysteries, drawing debate over the sequence of steps required to turn rudimentary sensitivity to light into a complex photographic system.
New research suggests some components of vertebrate vision may not have been shaped incrementally as their genes passed down family lines but were 'stolen' from entirely different branches of life.
We May Finally Know How Our Eyesight Evolved, And It's Not From Our Branch of Life
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