Mystery origin of iconic Stonehenge Altar Stone deepens as search narrows

Summary
The hunt for the source of Stonehenge's mysterious Altar Stone has entered a new phase after scientists ruled out several previously proposed locations and moved a step closer to identifying its origins.
Description from Phys.
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Mystery origin of iconic Stonehenge Altar Stone deepens as search narrows
The hunt for the source of Stonehenge's mysterious Altar Stone has entered a new phase after scientists ruled out several previously proposed locations and moved a step closer to identifying its origins.
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Stonehenge Altar Stone’s Scottish origins ruled out in new study
Stonehenge mystery just got even more intriguing
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