When you picture Stonehenge, you see a silent, unmovable pile of gray rocks frozen in time. But the archaeological record shatters that postcard image, revealing a wildly dynamic saga of mass migration, genetic replacement, acoustic magic, medieval decapitations, and modern highway battles.

This episode goes beyond the famous silhouette to explore who built Stonehenge, how they engineered it, why they raised it, and why people are still fighting over the dirt it sits on. From bluestones hauled 150 miles from Wales to an altar stone traced to Scotland, it's the untold human story of one of the world's most famous monuments.

• The 25-ton sarsens were locked together with mortise-and-tenon and tongue-and-groove joints, prehistoric earthquake-proofing borrowed from woodworking techniques
• Pine post holes under the old car park d ...