The megaliths of Stonehenge and Avebury have stood mute for thousands of years, but speak clearly to the ritual beliefs of those who built them http://on.natgeo.com/2BBrre4

The megaliths of Stonehenge and Avebury have stood mute for thousands of years, but speak clearly to the ritual beliefs of those who built them http://on.natgeo.com/2BBrre4 

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