'Immortal' Animals: Scientists Unravel Secrets of Centuries-Long Life

• Greenland Shark: Longest-living vertebrate (avg 400 years), lives in Arctic, slow metabolism, rare aging/cancer; scientists study its genes.
• Ocean Quahog Clam: Longest-living non-colonial animal, 'Ming' lived 507 years, age determined by growth rings; cold water aids survival.
• Red Sea Urchin: Lives over 200 years, shows no aging signs, remains fertile at 100, regenerates; robust cell repair is key.
• Galápagos Giant Tortoise: Lives 175-200+ years, strong immune system and DNA repair slow aging; can survive long without food/water.
• Bowhead Whale: Longest-living mammal (200+ years, one 268), Arctic habitat, thick blubber, slow metabolism; cancer-resistant genes.

Why It Matters: Scientists study 'immortal' animals to unlock secrets of extreme longevity and anti-aging.