> I agree that telomerase might not be the "immortality gene" but could you
> provide a reference to support your statement that Galapogos tortoises
> don't appear to age. I thought they just had a long lifespan?
I don't know about the tortoises, but there are some species that do
not age, most notably some fishes and lobsters. They do not age, and
just grow slowly larger until an accident or lack of food does them
in. I don't have Leonard Hayflick's _How and Why We Age_ here, but he
discuss this subject.
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