New research overturns the long-held belief that Greenland sharks are nearly blind, revealing they maintain functional eyesight for centuries. Scientists discovered well-preserved visual systems within the sharks, including healthy rod cells crucial for low-light vision. These findings demonstrate a remarkable adaptation to the dark depths where these long-lived creatures reside. Active genes responsible for light detection were also identified, confirming the sharks’ capacity to see throughout their exceptionally long lifespans. The study highlights the incredible physiological resilience of Greenland sharks. This challenges previous understandings of their sensory capabilities and offers insights into their survival strategies. Further research will likely explore the full extent of their underwater vision.