Life on Earth by Steve Jenkins

Life on Earth by Steve Jenkins

Author:Steve Jenkins [Jenkins, Steve]
Language: eng
Format: epub
Published: 0101-01-01T00:00:00+00:00


New species. The earth is constantly changing. Mountains and rivers

form and disappear, oceans rise or dry up, and forests and deserts come

and go. Even the continents are moving, and what is a tropical jungle today

may be covered w i t h snow and ice i n a few million years. These changes,

both fast and slow, cause some plants and animals to die out—to become

extinct. They also create opportunities for new forms of life to develop.

The first horses lived in dense forests about 55 million

years ago. They were only about a foot tall, and their

small size let them move easily through the vegetation.



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