ELI5. why do scientists always search for radio sygnals in space? Why do they think aliens use that to communicate?

Question

ELI5. why do scientists always search for radio sygnals in space? Why do they think aliens use that to communicate?

In: Technology

Answer 1

Radio waves are easy to detect, and an artificial sequence would be easy to identify, so it is a very practical search to undertake.

We also have gravity detectors, which could potentially pick up organised signals if such things existed, but because we don’t know how to produce such signals, it would be a lot harder to know if the signals picked up were artificial or not.