Fermi, etal, postulated a colony begats colonies, and each of them begats more colonies. The idea being the galaxy gets explored and colonized in an exponentiating manner.
My 'petri dish' comparison to the galaxy springs to mind. All the germ offspring of the original spore have spores of their own. By the time the 'mold' gets to the rim of the petri dish, the petri dish is full.
My 'petri dish' comparison to the galaxy springs to mind. All the germ offspring of the original spore have spores of their own. By the time the 'mold' gets to the rim of the petri dish, the petri dish is full.
The granting of a pardon is an imputation of guilt, and the acceptance a confession of it.