Stonehenge’s ‘altar stone’ originally came from Scotland and not Wales, new research shows ABC NewsA Scottish provenance for the Altar Stone of Stonehenge Nature.comHas the ongoing mystery of Stonehenge been solved? Experts have an ‘astonishing’ theory New York Post For Stonehenge’s Altar Stone, an Improbably Long Ancient Journey The New York TimesStonehenge megalith came from Scotland, not Wales, ‘jaw-dropping’ study finds The Guardian