Agrees- The mathematical probability alone seems to back that assumption up. Have you guys read about the DNA fragments found in asteroids/meteorites. It kinda freaks me out a little as cosmic seeding is some straight out of pulp sci-fi shit. Are they dropping in to say hi? Doubt it.
I've been into ancient alien theories for a little bit now and there are some that believe modern day man was genetically engineered to hasten the evolution process. Sounds far out there, but man did go from cave dwelling hippies to harnessing the power of the atom in a short period of time in terms of evolution.