From: "Tony Ingenoso" 

Life (apparently) requires DNA (on this planet and ecosystem), but not all
DNA can necessarily create something live.

DNA is a broad term for a virtually infinite number of similarly structured
acids, much the same way there are (theoretically) an infinite number of
possible hydrocarbons molecules.


"John Beckett"  wrote
in message news:3efd598b.23163487{at}216.144.1.254...
>
> Re your definition that something is alive if it has DNA: The evolution of
> life from inanimate matter is a very unlikely event. The fact that all
> living matter uses DNA (and has certain other key characteristics)
> suggests that life has evolved only once on Earth.

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