© David BoyerAncient mystery: The stone wheels are thought to be 2,000 years old
Satellite and aerial photography has revealed mysterious stone 'wheels' that are more numerous and older than the Nazca Lines in countries such as Syria, Saudi Arabia and Jordan.
The structures are thought to date back 2,000 years, but why they were built is baffling archaeologists and historians.
© David BoyerHidden: Thousands of people have probably walked past the structures and not realised what they were
© David BoyerBaffling: None of the Nazca Line-like patterns appear to be lined up with astronomical phenomena
He added: 'People have probably walked over them, walked past them, for centuries, millennia, without having any clear idea what the shape was.'
The local Bedouin, a nomadic people found in Saudi Arabia, Jordan, Libya, Egypt and Israel, call them the 'works of the old men'.
They are often found on lava fields - but don't fall into any pattern, according to Kennedy, whose research into them will be published in an upcoming issue of the Journal Of Archaeological Science.
© Getty ImagesSimilar: The ancient and mysterious Nazca Lines in the Nazca Desert in Peru
None are believed to be aligned with the stars, which has added to the mystery surrounding their purpose.
They were actually first discovered in 1927 by an RAF pilot called Lt. Percy Maitland, but it wasn't until Professor Kennedy and his team began studying aerial and Google Earth photographs that their true extent was revealed.
A final count has yet to be completed, but Kennedy is certain they run into the thousands.
© David BoyerLocal knowledge: The Bedouin call the structures the 'work of the old men'
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