A new Stonehenge theory posits that 500 years before the current stones were raised, an earlier stone circle marked the graves of more than 200 men, women, and children.
This mixing of remains was perhaps designed to combine different ancestries into a single lineage, archaeologists speculated.
The creation of the mysterious monument and the culture built around it suggests Stonehenge was thought as a symbol of unity in late Neolithic Europe, British researchers say.
Stonehenge wasn't the only mammoth circle in southern England 5,000 years ago. Using new radar imaging equipment, scientists have identified what was once a nearby circle of huge timbers.