I wonder why the water isn't frozen.

I suppose there must be some internal heat left still.

A few patches with lakes of lava under them.
Perhaps this valley is just over one, and that's why these creatures have managed to survive.
"Ah! there's another of them, smaller, not so strongly formed.

That thing's mate, I suppose--female of the species.

Ugh! I wonder how many hundred of thousands of years it will take for _our_ descendants to come to that." "I hope our dear old earth will hit something else and be smashed to atoms before that happens!" exclaimed Zaidie, whose curiosity had now partly overcome her horror.