On the contrary Dave. Even when the Milky Way and Andromeda have the eventual waltz their trajectories suggest, my cat swinging test still holds. And that was in respect of any idea of panspermia. Galaxies within a cluster, stars within a galaxy, planets within a star system.... It's only scale that differs. Galaxies passing through each other are still component far enough apart for the panspermia idea to be effectively dismissed.

Keith is as ever confusing believing with belief. I keep telling him this religion lark is too complicated for him. Stick to crosswords.