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Seeing Again: Blind fish parents have fry that see

By Susan Milius

- More than 2 years ago

Keep them in the dark for a million years. Then cross two strains of cave-dwelling fish, now totally blind. It turns out some of their kids will be able to see.

LIGHT AND DARK. A fish from generations of cave dwellers (front) ends up without eyes as an adult even though surface dwellers considered part of the same species complex (the two behind) develop normal eyes.