Why do some animals live longer than others? Whales and large turtles can live for hundreds of years, while some large birds can last almost a century. Not so much humans, though, as far as we've come in extending our lifespans.
"Large animals live longer for two main reasons," zoologist Kevin Healy of Trinity College Dublin told Discovery News. "The first one is that to be large you need more time and resources for growth so it follows you must live longer just to achieve getting large. The second reason is that, once large, an animal is often shielded from many external causes of death such as predators (too big to tackle) or food shortages (as large animals can store large fat reserves)."
Healy led the latest research concerning longevity in birds and mammals. The study is published in the journal Proceedings of the Royal Society B.