Scientists may have solved Stonehenge’s biggest mystery

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   Stonehenge’s Altar Stone likely moved by humans, not ice—new evidence

   Researchers now believe Stonehenge’s six-ton Altar Stone and other bluestones were transported hundreds of kilometers by ancient people, not glaciers. Advanced mineral analysis rules out glacial movement, suggesting intentional human effort. The exact methods remain unclear, but the discovery reshapes understanding of prehistoric engineering. Debate persists over whether glaciers moved some stones a century ago.

   What's confirmed:

   • Scientists found no glacial sediment signatures near Stonehenge, strongly indicating humans moved the bluestones and Altar Stone intentionally.
   • The six-ton Altar Stone was likely transported over 450 miles from Scotland by ancient people, requiring organized effort.
   • A century-old debate over whether glaciers carried the Newall boulder and similar stones to Stonehenge has been settled in favor of human transport.
   • Advanced mineral analysis of river sediments near Stonehenge detected no traces of glacial activity, reinforcing the human-transport theory.
   • The discovery suggests prehistoric societies had sophisticated planning and coordination capabilities.

   Still unconfirmed:

   • Stonehenge’s bluestones may have been moved using unknown ancient techniques, though no specific methods have been confirmed.
   • Some stones could still have been transported by glaciers before human intervention, though evidence for this is lacking.
   confidence 88%