9 Dinosaur timeline

DINOSAUR TIMELINE The time when dinosaurs dominated the Earth is called the Mesozoic Era. It lasted for over 180 million years. This era is divided into three time periods called the Triassic, Jurassic, and Cretaceous. During these periods, the climate changed and different plants and animals appeared. TRIASSIC PERIOD Most of the Earth was hot and dry. There weren't many plants and the land was a desert. Small dinosaurs and tiny mammals began to appear for the first time.

恐龙统治地球的时代被称为中生代。 它持续了超过1.8亿年。 这个时代分为三个时期，分别是三叠纪、侏罗纪和白垩纪。 在这些时期，气候发生了变化，出现了不同的动植物。 三叠纪地球的大部分地区又热又干。 那里没有多少植物，土地是一片沙漠。 小型恐龙和小型哺乳动物开始首次出现。

JURASSIC PERIOD The Earth became much wetter. Forests and lush vegetation grew, providing food for enormous plant-eating dinosaurs. Dragonflies and the first birds also appeared. CRETACEOUS PERIOD The temperature dropped, creating a warm, wet climate. Dinosaurs were the most powerful creatures on Earth- but at the end of the Cretaceous, many of them became extinct. 200-145 million years ago

侏罗纪时期地球变得更加湿润。 森林和茂盛的植被生长起来，为巨大的食草恐龙提供了食物。 蜻蜓和第一批鸟类也出现了。 白垩纪温度下降，形成了温暖潮湿的气候。 恐龙是地球上最强大的生物，但在白垩纪末期，它们中的许多都灭绝了。 2亿到1.45亿年前