"Jupiter is evidently passing through a Carboniferous or Devonian
period such as existed on earth, though, if consistent with its
size, it should be on a vastly larger scale," said the doctor.
"I never believed in the theory," he continued, "that the larger
the planet the smaller should be its inhabitants, and always
considered it a makeshift, put forward in the absence of definite
knowledge, the idea being apparently that the weight of very
large creatures would be too great for their strength. Of the
fact that mastodons and creatures far larger than any now living
on earth existed there, we have absolute proof, though
gravitation must have been practically the same then as now."
Just here they came upon a number of huge bones, evidently the
remains of some saurian, and many times the size of a grown
crocodile. On passing a growth of most luxuriant vegetation,
they saw a half-dozen sacklike objects, and drawing nearer
noticed that the tops began to swell, and at the same time became
lighter in colour. Just as the doctor was about to investigate
one of them with his duck-shot, the enormously inflated tops of
the creatures collapsed with a loud report, and the entire group
soared away.
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