- The Jurassic period is divided into three periods.
Bird wings appeared in the late Jurassic period.
There were many species in the Jurassic period.
The middle and late Jurassic period was the most prevalent period of dinosaurs.
The climate during the Jurassic period was very warm.
The Jurassic extinction began in the Triassic.
There were very few species on earth in the early Jurassic period, and only dinosaurs thrived.
The Jurassic name is taken from the Jurassic Mountains.
There were a lot of marine reptiles in the Jurassic ocean.
The Jurassic world is rich in coal resources.