How old could dinosaurs live?

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#90232Thu 06/12/07 14:12		Is there any evidence in the geological record to suggest how old any particular species of dinosaur could live? Does anyone have any idea how much they'd grow each year? Can you infer age from size at all? I presume that like animals today, some species were long-lived and others were almost ephemeral by comparison. But what evidence exists?
kibThu 06/12/07 14:13		i think i read once that the bigger they are the longer they lived, but not sure.. lemme have a lookski...
finalfrontier1976Thu 06/12/07 14:14		Now that's a question I've never thought of, I'll track this.
ricksterThu 06/12/07 14:15		try wikipedia!
#90232Thu 06/12/07 14:17		quoting > "i think i read once that the bigger they are the longer they lived," You're probably right in your memory because this is generally true of all animals today. The main exception is dogs versus cats. Cats tend to live longer than dogs because they're less distorted by selective breeding.
kibThu 06/12/07 14:18		How long could a dinosaur live? Scientists do not know the exact lifespan of dinosaurs, but they estimate that they lived about 75 to 300 years. Animal lifespans relate in part to their body size and in part to their type of metabolism. Their possible maximum age can be estimated from the maximum lifespans of modern reptiles, such as the 66-year lifespan of the common alligator and the impressive lifespan of some tortoises. One specimen of the now-extinct Black Seychelles Tortoise, which was an adult when captured, lived a record 152 years in captivity (1766-1918) and had an accidental death. These estimates, based on lifespans of cold-blooded animals, would be too long if dinosaurs had metabolisms more similar to modern birds and mammals.
philc777Thu 06/12/07 14:22		"Cats tend to live longer than dogs because they're less distorted by selective breeding." But the royal family seem to keep going quite well....

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