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Answer:
The earliest stone tool making developed by at least 2.6 million years ago. The Early Stone Age began with the most basic stone implements made by early humans. By 200,000 years ago, the pace of innovation in stone technology began to accelerate. Middle Stone Age tool kits included points, which could be hafted on to shafts to make spears. During the Later Stone Age, the pace of innovations rose. People experimented with diverse raw materials the level of craftsmanship increased, and different groups sought their own distinct cultural identity and adopted their own ways of making things.
Explanation:
Some Scientists believe the missing carbon is going into the boreal forest. They are not sure because the boreal forest both absorbs and releases carbon dioxide. Scientists need more data, gathered from a large region over a period of time in order to come to any firm conclusions about the missing carbon.