I feel that we know something more about physics than illiterate tribesmen. There are not infinitely many kinds of particles which nature provides for communication. We have produced many particles in our accelerators, but none have the information carrying capabilities of photons. We have investigated all particles that can be created with a few trillions of electron volts.
Photons travel as fast as anything, are easy to generate, to modulate, to direct, and to detect. Once we fix on photons, the next issue is wavelength (frequency). When we decide on frequency, we need to discuss more technical details.
Electromagnetic radiation is the only way that there is (as far as is currently known) to communicate over interstellar distances. That situation is very unlikely to change.
Space/Science » in reply to re: Search for Extraterrestrial Intelligence
I do not see it that way.
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- Search for Extraterrestrial Intelligence