Listen to the sound clip Dimetrodon lived during X the Permian time period, which is part of the Paleozoic era, before dinosaurs ever existed. The first dinosaurs appeared in the Triassic period of the Mesozoic era. from Rex (Wallace Shawn) TTS Computer AI Voice:
Dimetrodon lived during X the Permian time period, which is part of the Paleozoic era, before dinosaurs ever existed. The first dinosaurs appeared in the Triassic period of the Mesozoic era.
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