LIVES FOR 500 YEARS! This Ancient Shark Is the Longest-Lived Vertebrate on Earth!

The majestic Greenland shark, a true marvel of the deep, inhabits the frigid, dark expanses of the North Atlantic and Arctic Oceans. These slow-moving giants possess an astonishing ability to endure, with some individuals estimated to live for centuries. Their remarkable longevity is closely tied to their environment and unique biology.

Scientists have unveiled the secrets of their age through innovative methods, primarily by radiocarbon dating the proteins within the lens of their eyes. Unlike many other shark species whose age can be estimated by growth bands on fin spines or vertebrae, Greenland sharks lack such hard tissues. Instead, the central part of the eye lens contains proteins formed before birth, which remain unchanged throughout their lives, acting as a biological time capsule. By analyzing the levels of radioactive carbon, including traces from mid-20th-century nuclear bomb testing, researchers can pinpoint their approximate birth year, revealing lifespans that can exceed 400 years.

This extraordinary lifespan is largely attributed to their exceptionally slow metabolism, a direct adaptation to their cold, deep-water habitat where temperatures can hover just above freezing. Living in such an extreme environment means a slower pace of life, with Greenland sharks growing less than a centimeter per year and not reaching sexual maturity until they are around 150 years old. Their sluggish movement, often less than one meter per second, further conserves energy and reduces cellular damage over time, factors believed to contribute significantly to their extended existence. Studies have also begun to explore their genome, identifying genetic adaptations that may enhance DNA repair and protect against age-related damage, offering further clues to their incredible resilience.