The Fool wrote: >Not all Alien species will be / are unselfish in this way. If fact the >entire point is that the Aliens almost certainly *would* journey for >reasons of colonization and population pressure. All enhabitable planets >/ stars / whatever would have been colonize by one of the first species >to make space travel. Thats exactly what we as humans would do, and I >would expect no less from aliens. > Perhaps, but we would send out a lot more probes a la Voyager than motherships, and it seems reasonable to suggest other spacefaring species would utilise some form of probe to find the best directions for motherships to go. So we are far more likely to find one of these probes than we are to have motherships descending on Earth to terraform/colonise. On that basis, the fact that we haven't been colonised doesn't mean alien ships of some sort haven't been here many times in the last few billion years.
Cheers Russell C.
