The lifespan of mammals is about 1 and a half billion heartbeats.
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A tortoise named Adwaita lived to 255 years old. To put it into perspective, he was born before the United States of America existed and his death was announced on CNN (1750-2006).
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The oldest recorded elephant lived for 82 years.
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The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
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A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
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