Early Civilizations and Their Histories
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The World Surface is Changing.
The Four Principle Ice Ages are established by looking at soil samples etc.
Pre-Literary History- Is a guess at how people lived.
1. The first stage was estimated at 3-4 million years ago in Southern and Eastern Africa.
2. The second stage is Homo Erectus, estimated at 1.5 million years ago.
3. The third stage is Homo Sapien-wise human being...