A Greenland Shark Born in 1620 Is Still Alive Today Scientists estimate that a Greenland shark born around the year 1620 is still alive, making it one of the oldest living vertebrates ever discovered. That means this shark has survived for over 400 years—longer than most civilizations. Its extraordinary lifespan is linked to an extremely slow metabolism and cold deep-sea environments, offering valuable clues for aging research. Important Details: • Estimated birth year: ~1620 • Over 400 years ol