Analysis of the stone artifacts from zhoukoudian indicate that the tools from:
the later stag...
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Analysis of the stone artifacts from zhoukoudian indicate that the tools from:
the later stages are heavier and larger than the previous stage.
all stages are identical to each other.
the earliest stages are made from flint and fine-grained quartz.
the later stages are small and the tool materials are of better quality than the previous stages.
the later stages are large and crudely made.
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