Starivore Extraterrestrials – Interacting Binary Stars as Metabolic Systems [pdf]
student.vub.ac.be
student.vub.ac.be
http://en.wikipedia.org/wiki/Zipf's_law
http://www.peterrussell.com/Dolphin/DolphinLang.php
One of the problems with this approach is that data compression takes advantage of these frequencies so that at maximum compression the slope tends back towards 0 (perfect compression is almost indistinguishable from noise).
To me, this is the most likely reason why we haven't discovered extraterrestrials. Without the decompression/de-encryption key, we have no way of seeing the sea of data that's probably being transmitted all around us. That and the fact that aliens have probably learned how to communicate with neutrinos because they are able to build arrays of nano-detectors that can sense the perturbations that are too faint for us to see. Also the beams are probably directional, not broadcasted for all to see. So looking for direct evidence of a civilization, something like a heat signature or particular arrangement of matter, is probably going to be more fruitful than eavesdropping on communications.
We're going to feel awfully stupid if this hypothesis turns out to be correct and ETI was sitting out in plain view for decades.
http://phys.org/news/2012-07-chemists-molecular-bond-white-d...
Only inasmuch as two groups of people walking past each other in a desert counts as "mating". Galaxies are very sparse, so their collisions don't actually involve much colliding but do a lot of passing by.