Some relevant SETI items

Larry Klaes (
Mon, 26 Jul 1999 11:48:47 -0400

"Detectability of Extraterrestrial Technological Activities" by Guillermo A. Lemarchand:

Dr. Allen Tough proposes that ETI are here in the form of interstellar nanoprobes and are monitoring our Internet. This may explain why they haven't contacted us. :^)

And for an idea of what finding an alien civilization on Mars might be like: