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The Old Stone Age is also known as the Paleolithic Era and began at the dawn of human existence, about 2.5 million years ago, until 12,000 years ago. The New Stone Age is also called the Neolithic Era and lasted from abo... More »

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The period of time commonly referred to as the Stone Age, or more specifically the "Old" or "Early" Stone Age, began with the first emergence of human beings and ended about 12,000 years ago. The descriptive term "Stone ... More »

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During the long Neolithic period, from 6800 to 3200 B.C., shelters were built using thick timber posts, clay and stone for the foundation and walls, while roofs were made from tree trunks, clay and hay. Other characteris... More »

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The era occurring before the current geologic era was the Mesozoic, which began roughly 245 million years ago and ended about 64 million years ago. The Mesozoic era consisted of three periods; from oldest to more recent,... More »

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The Stone Age began 2 to 3 million years ago and ended at around 3300 B.C. The dates for the beginning and end of the Stone Age are ranges because the definition of the age refers to the tools which were developed at dif... More »

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The Triassic period began approximately 248 million years ago and ended 206 million years ago; although, some sources date it to be between 251 and 199 million years ago. It was followed by the Jurassic period; it was th... More »

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Dinosaurs first walked the earth 230 million years ago and dominated the land for 160 million years. They became extinct 65 million years ago during the Cretaceous period. More »

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