[magduf]

>Earth has been broadcasting that it has free oxygen for nearly two and a half billion years and we have no evidence of any attack.

Have you forgotten about the K-T event? :-)

The dinosaurs learned the hard way the danger of not having a significant space program. It seems we're not doing that much better.

[jerf]

I run on the theory that if an alien civilization intended to destroy Earth, they would have succeeded. An alien civilization that reaches out once every few dozen million years years to sorta kinda whack the Earth seems about as likely as aliens hopping in their FTL spaceships and traveling the vast distances across the cosmos to our primitive little dirt ball, only to constantly crash into mountains located near secret military bases.