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Greenland sharks retain functional vision for centuries, study finds

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New research has overturned the long-held belief that Greenland sharks are nearly blind, revealing that their visual systems remain well-preserved across their exceptionally long lifespans. Scientists found that the sharks' eyes are specially adapted for low-light conditions, suggesting strong evolutionary suitability for their deep, dark ocean habitat. Examination of their eyes revealed healthy rod cells and active genes linked to light detection, indicating sustained visual function. These findings highlight the remarkable biological adaptability of Greenland sharks, which are among the longest-living vertebrates on Earth.

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Greenland sharks retain functional vision for centuries, study finds · ShortSingh