'Stonehenge: The Lost Circle Revealed' is on BBC 2 at 9pm, tonight, 12th February.
"Using cutting edge research, a team of archaeologists have compiled evidence to fill in a 400-year knowledge gap about Stonehenge. By combining 3D scanning, field archaeology and lab analysis, they've discovered where the bluestones were quarried and where they first stood. Professor Alice Roberts joins Professor Mike Parker Pearson to piece together more parts of the puzzle."
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