A new discovery has been made about one of the ancient wonders of the world.
Stonehenge, which sits on the Salisbury Plains in England and was assembled over 5,000 years ago, contains a central Altar Stone which has been identified as originating in Scotland, over 700 kilometres away from Salisbury.
The discovery is the result of years of work from an international group of researchers.
Professor Nicholas Pearce, from Aberystwyth University in Wales, joins Mark Leishman.
Stonehenge Photo: http://www.english-heritage.org.uk/visit/places/stonehenge/history/
