Greenland sharks live 400+ years, mostly blind in Arctic depths

In the lightless depths of the North Atlantic, creatures older than modern nations move through the cold in near-total blindness — and have done so for centuries. Greenland sharks, some alive during Newton's era, represent one of Earth's most extreme experiments in longevity, reaching sexual maturity only after 150 years and living well past 400. Their existence challenges our assumptions about what a life must look like to be successful, suggesting that slowness, darkness, and patience can be as powerful a survival strategy as speed and sensation.