"You know spectrum analysis has proved that there is a gas in Saturn's atmosphere which we know nothing about, and, however good it may be for the Saturnians, it's not very likely that it would agree with us, so I think we'd better be content with our own.
Besides, the atmosphere is so enormously dense that even if we could breathe it it might squash us up.

You see we're only accustomed to fifteen pounds on the square inch, and it may be hundreds of pounds here." "Well," said Zaidie, "I haven't got any particular desire to be flattened out, or squeezed dry like an orange.

It's not at all a nice idea, is it?
But look, Lenox," she went on, pointing downwards, "surely this isn't air at all, or at least it's something between air and water.
Aren't those things swimming about in it--something like fish in the sea?
They can't be clouds, and they aren't either fish or birds.

They don't fly or float.

Well, this is certainly more wonderful than anything else we've seen, though it doesn't look very pleasant.