Stonehenge may have been built to symbolise a unification in Stone Age Britain. The idea could explain why so many of the stones making up the monument were brought in over huge distances.

Located on Salisbury plain in southern England, Stonehenge seems to have been built in phases between 3100 and 1600 BC. There is an outer ring of vertical sarsen stones topped by horizontal lintels; inside that is a smaller ring of vertical bluestones and a number of other stones, including a horizontal…