[Grimward]

To G. Elliott, thanks for the trip down memory lane. Also, a belated welcome to the Chrons. Beware its addictive qualities, or suffer the (happy!) consequences!

To Ultraculture, do you recall if part of the plane was eventually taken over and frozen, or, at least, the temperature was markedly lower and the light noticeably dimmer in that part of the plane? I remember a film from the 1970s that kind of matches your description, but the name isn't coming to me yet.....