- - the first period of the mesozoic era. it began 252 million years ago, at the close of the permian period.
- - Post-Permian period
- - Period when dinosaurs appeared
- - Period of the first dinosaurs
- - The first period of the Mesozoic era, in which dinosaurs first appeared
- - Time of first dinosaurs
- - Period when mammals first appeared
- - Terrible crisis at time dinosaurs appeared
- - First period of the Mesozoic Era
- - Period in which dinosaurs appeared
- - Relating to the time of the first dinosaurs
- - Period bookended by extinction events
- - Arizona's Petrified Forest dates from this period
- - Early dinosaur period
- - Dinosaur time period
- - Mesozoic Era period
- - Geological period
- - Geological period when the first dinosaurs appeared
- - Fox almost seizes turkey, one of a certain age
- - Very old
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