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"It seems to me the greatest challenge to thinking about potential life outside this planet is being mentally bound to the constraints of life on this planet."

I'm having a hard time finding all the people stodgily insisting that only life exactly like Earth's is possible through the hordes of people screaming about how it might not be. Everybody already knows that life might not be exactly like Earth life. Any illusions to the contrary have been shattered by Earth life itself and the concrete existence of extremophiles, which are themselves already not what most people imagined "Earth life" to be.

I'll make that claim. Even extremophiles are very earth like life forms: the have similar chemistry behind them.

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