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A teapot in orbit around the sun somewhere between Earth and Mars.
Or a vase of petunias and a blue whale skeleton?
That manhole cover from Operation Plumbbob.
“YOU ARE HERE” map.
I’d suggest 35,000 low-earth-orbit satellites but Elon is already working on that.
Sprinkle some water on the moon
A single protein molecule.
Something subtle enough to spark debate and controversy but not overplaying it like putting an entire living thing from Earth would be.
Dark matter, duh.
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