Researchers now know the exact region in Scotland where Stonehenge's Altar Stone originated, thanks to a chemical analysis of the behemoth rock's geological makeup.
The finding, which is part of a new study published Wednesday (Aug. 14) in the journal Nature, offers further evidence that the builders of the immense monument would have used advanced methods to transport the approximately 13,200-pound (6,000 kilograms) stone from its original location to its current site in southern England, where it now sits in the inner circle of Stonehenge, according to a statement from Aberystwyth University in Wales.
