They were pretty smart. Well, they were more smart, than pretty...
They gone extinct like most others. Some competition from relatives. We ate 'em in some sense of the word at least.
In theory evolution may do about anything. By the way, when we will bring back the Dinosaurs, it's evolution bringing 'em back by proxy. We are the evolution's product too, you know.
We know a lot about how life MAY arise already. But we don't know a lot about the possibilities that actually happen on Earth billions of years ago.
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