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Meet Bluey: World’s Oldest Dog at 29 Years!

5/15/2025

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Story summary

At an astonishing 29 years old, Bluey, the Australian cattle dog, has earned the title of the world's oldest dog, far surpassing the typical lifespan of 10-13 years. A groundbreaking study in Scientific Reports reveals that longer lifespans in mammals may be tied to larger immune system gene families, uncovering fascinating links between brain size and longevity across 46 species.

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Story summary

At an astonishing 29 years old, Bluey, the Australian cattle dog, has earned the title of the world's oldest dog, far surpassing the typical lifespan of 10-13 years. A groundbreaking study in Scientific Reports reveals that longer lifespans in mammals may be tied to larger immune system gene families, uncovering fascinating links between brain size and longevity across 46 species.