[lneisone]

Sincere questions

If we hypothesize an advanced civilization passed near earth on a rogue planet within the last 1,000,000 to 200,000 years ago.

Would one of their priorities be to race out faster than the speed of light to block or recall ALL of their radio transmissions? Did their civilization bypass “the radio age” ?

Why have we not discovered a buried calculator or a jet airplane? Could a vehicle biodegrade entirely in 1,000,000 years? We never see a farm tractor calving out of a glacier. If their printed circuit boards had gold we should occasionally stumble across one. If they are under water why did they build exclusively on the coast?

[Norm Lenhart]

All good points. But that’s colonization, not existance.

Take the mars rover. In a million years will it be on or near the surface, whole and waiting to be discovered?

Or will it be dust?

Either way we exist/existed.

[zeugma]

Why have we not discovered a buried calculator or a jet airplane? Could a vehicle biodegrade entirely in 1,000,000 years? We never see a farm tractor calving out of a glacier. If their printed circuit boards had gold we should occasionally stumble across one. If they are under water why did they build exclusively on the coast?

Google "forbidden archaeology"