Add Yahoo as a preferred source to see more of our stories on Google. Maintaining perfect vision for 400 years is a biological achievement for the Greenland shark. Operating at 9,500 feet creates high ...

Maintaining perfect vision for 400 years is a biological achievement for the Greenland shark. Operating at 9,500 feet creates high-pressure conditions that typically trigger retinal DNA fragmentation.

The longest living vertebrate on Earth may have a thing or two to teach us about maintaining our eyesight into old age. New research has shown that the Greenland shark does not experience impaired or ...