(NEWSER) – There are no shortage of theories about Stonehenge, but few are so melodious as this: A recentstudy carried out by the Royal College of Art in Londonsuggests that the monument holds a "sonic secret." The researchers' theory surrounds Stonehenge's bluestones, some of which hail from 200 miles away in Wales' Preseli Hills. While archaeologists are still working to establish whether man or, perhaps, glacier carried them to Wiltshire, the Royal College of Art researchers suggest the rocks were intentionally brought to Stonehenge because of their "unique acoustic properties." As part of a larger study of the acoustic elements of the Pembrokeshire landscape where the bluestones hail from, it was discovered that many of the rocks in the area issue a metallic sound (akin to a bell or gong) where hit with a hammerstone.

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