Yeah, Mitochondria are a big deal in aging. Animals of a given size with larger mitochondria populations, like hummingbirds, tend to live a lot longer than oth

Yeah, Mitochondria are a big deal in aging. Animals of a given size with larger mitochondria populations, like hummingbirds, tend to live a lot longer than other animals of similar size. Though hummingbirds lose their ability to hover and hence feed normally in the wild long before they die of old age. Nick Lane wrote about book about mitochondria I'd heartily recommend: Power, Sex, Suicide: Mitochondria and the Meaning of Life. EDIT: And Aubrey de Grey of course has a typically audacious/crazy plan for dealing with mitochondrial mutations. http://www.sens.org/research/introduction-to-sens-research/mitochondrial-mutations http://www.sens.org/research/introduction-to-sens-research/m...