For part of its existence as an ancient temple, Stonehenge doubled as a substantial prehistoric art gallery, according to new evidence revealed yesterday.

A detailed laser-scan survey of the entire monument has discovered 72 previously unknown Early Bronze Age carvings chipped into five of the giant stones.

All of the newly discovered prehistoric art works are invisible to the naked eye - and have only come to light following a laser-scan survey which recorded literally billions of points micro-topographically on the surfaces of the monument's 83 surviving stones. In total, some 850 gigabytes of information was collected.