The length of all Chinese defense walls built over the last 2,000 years is about 31,070 miles. Earth’s circumference is 24,854 miles.
— Random Facts (@factsandtrivia) January 9, 2015
The length of all Chinese defense walls built over the last 2,000 years is about 31,070 miles. Earth’s circumference is 24,854 miles.
— Random Facts (@factsandtrivia) January 9, 2015
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