human
These are real Stone-Age pictures, said Dick as they went deeper and deeper into the cave.
gpt
They are like the ones that Umba is painting now in his cave, but they show animals that have died out long ago. See, here are drawings of extinct animals. There is the sabre-tooth tiger. And look, that is a mastodon with long, curved tusks.
human
Jiminy, wouldn't it be wonderful if we could find one or two left over?
gpt
A mastodon? Not likely! The climate has changed since the time that picture was made and those giants died out long ago,
human
Well, anyhow, some day we will go hunting in the high mountains. Maybe we can find one or two animals that are extinct everywhere else.
gpt
We'll certainly do that little thing,