The Mirror at the Bottom of the Telescope
We have spent a century waiting for a signal from the stars while the harder evidence accumulated quietly, under our own instruments. The belief that human beings are the first and last word in living things is a habit we inherited from a smaller universe, and every measurement of the last thirty years has been quietly taking it apart. The question most people ask about other life rests on a misunderstanding of what the evidence would look like. They are waiting for an arrival: a radio transmission decoded at a desert array, a craft on a runway, a face on a screen. That image of contact comes from a century of film and pulp fiction, and it has trained the public to assume that until the ship lands, the rational position is that we are alone. The opposite is closer to the truth. The case that life is not a one-time accident confined to a single damp rock has been arriving for thirty years, in increments, written in the language of chemistry and statistics rather than the language of greeting. We failed to notice because it never knocked.

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