Using points and examples from the talk, explain the two possible ways early humans discovered how to use fire to release copper from solid rock.

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Using points and examples from the talk, explain the two possible ways early humans discovered how to use fire to release copper from solid rock.

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2019-10-02 bishoy 66.00 Check this speaking
2019-10-02 bishoy 83.00 Check this speaking
2019-10-02 bishoy Check this speaking
2019-10-02 bishoy 66.00 Check this speaking
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