[Ah, that's...pretty terrible actually. He knows what it's like to be from a world that's dying around him, considering the shape of the underground domes he once lived in. His face is sympathetic.]

Oh..I'm sorry to hear that.

[He's not sure if they're from the same world, but it seems unlikely. There are tons of human remains all over the place, and that wouldn't be true if they were dwindling like that.]

Mmm. [He nods.] They were wiped out in the great floods that let sea creatures evolve to be the dominant life forms. We encounter a lot of what of what they left behind, for better or worse.