Greenland sharks retain eyesight for centuries due to DNA repair

Greenland sharks, the world's longest-living vertebrates, maintain their eyesight for centuries due to a potential DNA repair mechanism. This discovery challenges previous assumptions about their poor vision, suggesting their eyes remain functional even with parasites. The sharks can live up to 400 years and inhabit cold Arctic waters. Researchers observed eye movement towards light in these ancient creatures, indicating preserved vision. The study was published in Nature Communications.