书虫牛津英汉双语读物气候变化(2级适合初2初3)(英汉对照)/书虫牛津英汉双语读物

The Earth is very old. It has changed often during its long life, and it is still changing. Millionsof years ago, when dinosaurs like Tyrannosaurus rex were alive, the Earth was much warmer. There wasvery little ice on the land or on the sea, even in the very north or the very south of the world.And the sea was much higher than it is today. There have been many changes since that time,sometimes to a warmer climate, sometimes to a colder one. About 115,000 years ago, for example, atime called an Ice Age began. 20,000 years ago, there was ice over much of the world, and it was 3kilometres deep over much of North America and Europe. And the sea was not as high as it is today.Our climate has changed many times, and it will change again.