Hidden structure found inside the Great Pyramid of Giza

The Great Pyramid of Giza has been shrouded in mystery for millennia, but now a long-held secret of its structure might be known thanks to particle physics. A narrow void lying deep within the ancient Wonder of the World has been found by scientists using cosmic-ray based imaging. The internal structure is located above the Grand Gallery - which links two of the Pyramid's chambers - and traces a similar route for at least 30 metres (100ft). While the precise design and purpose of the void is unknown, it has been hailed by the team of academics as the biggest discovery inside the Giza landmark since the 19th century. The Great Pyramid of Giza has been shrouded in mystery for millennia, but now a long-held secret of its structure might be known thanks to particle physics.