<span>it gave tribes greater control of their own affairs
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The Great Wall of China is the longest building on earth with a length of 13,170 miles. Made from a combination of brick, stone, wood and other materials, it was originally constructed primarily to serve as a defence against the nomadic invasions from the north that threatened Chinese states / empires.
Answer:
It's possible but extremely unlikely to Revive an extinct animal but It is possible to create an organism similar to whatever extinct animal that is in question using its dna or the dna of its relatives. If scientists did revive extinct populations it could have an extremely detrimental effect on humans and our environment.