Banksy strikes again: British guerilla artist Banksy has snuck this fabricated relic, dubbed "Early Man Goes to Market," into the British Museum. He explains:

The British Museum is home to some of the most treasured historical artefacts in the western world; the Elgin marbles, the Rosetta stone, and a piece of rock found on a building site in Peckham that Banksy has drawn a pre-historic man pushing a shopping trolley on. Having remained in the collection undiscovered for quite some time we are now offering it as the bounty in a treasure hunting competition.
The first person to locate the piece of rock glued somewhere in the museum and photograph themselves next to it will win an original Banksy painting of a shopping trolley.

(Anyone trying to remove the piece or alert museum staff will be instantly disqualified from the competition)

Email your picture to: banksy@banksy.co.uk