The conversation between human and AI assistant.
Could we use arecibo radar frequencies to read a message in a paper in an alluminium ball buried in a planet?
Interesting. Do you know of any other technologies that might be able to accomplish that?
Well, ground-penetrating radar is a technology that's commonly used to detect objects buried underground. It works by sending out electromagnetic signals that bounce off underground objects and then measuring the time it takes for those signals to return. It's possible that this technology could also be used to detect a message inside an aluminum ball buried in a planet, although it may not be as precise as Arecibo radar.