Another look at the Fermi Paradox :-)

[Matterplay1]

http://xkcd.com/1377/

[stevebowers]

This idea forms the basis of The Forge of God, by Greg Bear.

We've been sitting in our tree chirping like foolish birds for over a century now, wondering why no other birds answered. The galactic skies are full of hawks, that's why.

[Stardust]

Also reminds me of a central idea in The Killing Star

http://www.projectrho.com/public_html/ro...lling_Star