The Triassic Period
The Triassic Period: Dawn of the Dinosaurs The Triassic Period (approximately 252 to 201 million years ago) marks the beginning of the Mesozoic Era, following the devastating Permian-Triassic mass extinction. …
The Permian Period
The Permian Period: Earth’s Greatest Transition The Permian Period (approximately 299 to 252 million years ago) represents the final chapter of the Paleozoic Era and a time of profound change …