Uploaded on YouTube by National Geographic 2nd June 2008.
Some of the volcanic bluestones in the inner ring of Stonehenge officially match an outcrop in Wales around160 miles (257 kilometers) away, according to National Geographic, in a newsarticle published on its website 22nd December 2011.
The discovery leaves two big ideas standing about how the massive pieces of the monument arrived at Salisbury Plain:
entirely by human hand, or partly by glacier.
As it looks today, 5,000-year-old Stonehenge has an outer ring of 20- to 30-ton sandstone blocks and an inner ring and horseshoe of 3- to 5-ton volcanic bluestone blocks.
Many discoveries have been done in the recent years, but still many secrets remain surrounding the creation of Stonehenge. Archaeologists work today to unravel the complete mystery behind the huge stone structure.
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