Labels:text | screenshot | font OCR: JURASSIC PERIOD 208-144 MYA During the Jurassic Period, the dinosaurs evolved into some of the largest creatures ever to live on Earth. The sea was ruled by reptiles such as plesiosaurs and ichthyosaurs, while pterosaurs (flying reptiles) dominated the air. Mammals remained small shrewlike creatures. By the end of this period, the first known bird, Archaeopteryx, had appeared.
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