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In fact, there are a number of creatures with life spans that make the oldest living human seem like a spring chicken in comparison. Here's our list of the 10 animals with the longest life spans  and there's even an immortal animal. CREDIT: limowreck666/Flickr. Geoducks. First on the list are these large saltwater clams that are native to the Puget Sound and have been known to live for at least 160 years.
We can't conclude that a tortoise lives to 255 because it has a shell or because it's big; nor can we say that the tortoise evolved a shell or its large size because it has such a long life. Other types of animalsâespecially those with bigger brainsâseem to have developed long life spans for different reasons entirely: In general, the more social the animal, the longer it lives. Social insects have more longevity than the lonesome varieties: Some flies last only a couple of days, while a termite queen can survive for 30 years.