 What, now, about accounts that analyze life in terms of genetic information? Feldman thinks that something like the Jonah problem arises for any account according which being alive consists in containing DNA or other genetic information, as dead organisms contain DNA. A further problem for such views is that it is conceivable there are or could be life forms (say on other planets) that are not based on genetic information. This latter difficulty can be avoided if we say that being alive consists in having the ability to evolve, to engage in Darwinian evolution, assuming that evolution by natural selection is possible for living things that lack nucleic acid. We might adopt NASA’s definition, according to which life is “a self-sustaining chemical system capable of Darwinian evolution.” However, accounts like NASA’s are implausible for a further reason: while the ability to evolve by natural selection is something that collections of organisms—species—may or may not have, it is not a feature an individual organism may have. Later members of a species come to have features earlier members lacked; some of these new features may make survival more or less likely, and the less ‘fit’ are weeded out of existence. An individual organism, such as a particular dog, cannot undergo this process. Yet individuals may be alive.