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One would assume they have a natural lifespan from about 20-40 years more in Zoos- in not-too-distant times some morons used to toss spent flashbulbs ( from now-obsolete camera flashguns) into the Hippo"s drinking water, which the stupid beasts drank and it ruptured their digestive organs- yecch. progress in Photography- higher speed films, strobe flashes- even digital have eliminated this man-made and rather inept (hazard).l

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15y ago

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