Stonehenge: How Prehistoric Builders Moved 25-Ton Stones Across 750 km to Build the World's First Mortise-and-Tenon Monument

Neolithic builders hauled 25-ton sarsen stones, shipped Welsh bluestones 240 km, and dragged a Scottish Altar Stone 750 km by sea — then locked them together with mortise-and-tenon joints aligned perfectly to the solstice.

A daily 1-minute video series uncovering how the world's most iconic structures were built — from ancient wonders to modern skyscrapers.