DVW.AGM@MIT-OZ@sri-unix (11/17/82)
It appears that a popular belief concerning Communication with Extra-Terrestrial Intelligence is that we aren't smart enough to talk to them, i.e. they're using tachyons, while we're still using MERE photons. However, if they really want to talk to us it would seem likely that they would use as many different methods as they could. Even within the electromagnetic spectrum there are a number of wavelengths that seem particularly good for interstellar communication. These would include the celebrated "watering hole" around 21 cm, so named because there's little interference from any galactic sources (dust clouds, etc.). ... unless, of course, they had the equivalent of a Proxmire, ... Adam Mellis (dvw.agm@oz) -------