They don't want equal time - they want all the time there is. - Isaac Asimov

Pions are the mediating particles of the strong nuclear interaction. The intensity of the interaction depends on the mass of the pions and that mass can, under certain specialized conditions, be altered. The Lunar physicists have developed an instrument they call the Pionizer, which can be made to do jut such a thing. Once the pion's mass is decreased, or increased for that matter, it is, effectively, part of another Universe; it becomes a gateway, a crossing point.

Desde el punto de vista sociológico, es como si, cuando el viejo Imperio empezó a descomponerse en sus bordes, la ciencia les hubiese fallado a los mundos periféricos. Para que volvieran a aceptarla, tenía que aparecer disfrazada de otra cosa... Y eso es justo lo que ha pasado. Y ha funcionado a las mil maravillas.

I suppose he's entitled to his opinion, but I don't suppose it very hard.