Stonehenge: Central Altar Stone from Scotland not Wales BBC.comA Scottish provenance for the Altar Stone of Stonehenge Nature.comStonehenge’s 6-ton Altar Stone came from hundreds of miles away in Scotland, researchers say CBS NewsStonehenge megalith came from Scotland, not Wales, ‘jaw-dropping’ study finds The GuardianFor Stonehenge’s Altar Stone, an Improbably Long Ancient Journey The New York Times