SHOULD we break our interstellar silence? In the 50 years we have been scanning the skies in search of extraterrestrial intelligence, all we have heard is a whole lot of nothing. We have even sent a few hopeful transmissions into space, to no avail. Now some SETI researchers are suggesting that we take a more active approach and systematically advertise our existence to the cosmos (see “We’re from Earth. Hi there!”).
Others say this would be rash, and that to shout into the dark is unwise when we have very little idea who, or what, is out there. There’s…
