It recently occurred to my colleague Drew Steen and I that we need a word to describe organisms that have adapted to live for a million (I mean, maybe?) years, especially since the fact that their lifespans are this long has to remain a hypothesis, so we need to be able to talk about them as we test it. We came up with aeonophiles. It means that they love long time periods. It seems hard to pronounce, but it's ee-ohn-oh-files. Like someone who loves wine, but with an extra syllable. I don't know for certain that cells can actually achieve this feat of living for a million years, while slowly replacing broken bits but never dividing. But currently, all evidence suggests this is a reasonable hypothesis.