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Unknown, 2000
Current format, Unknown, 2000, , No Longer Available.
Unknown, 2000
Current format, Unknown, 2000, , No Longer Available. Offered in 0 more formats
How was the Earth formed? When did living things first appear? Why is the climate getting warmer? This book investigates the fundamental mysteries of how our planet was formed and how it was developed. Not so long ago, the world was as unknown and mysterious as the outer limits of space still are to us today. But in recent years scientists have learned a great deal about our planet and have begun to understand how it works.
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