Giant stone structures in the Azraq Oasis in Jordan They stretch from Syria to Saudi Arabia, can be seen from the air but not the ground, and are virtually unknown to the public. They are the Middle East's own version of the Nazca Lines -- ancient "geolyphs," or drawings, that span deserts in southern Peru -- and now, thanks to new satellite-mapping technologies, and an aerial photography program in Jordan, researchers are discovering more of them than ever before. They number well into the thousands. Referred to by archaeologists as "wheels," these stone structures have a wide variety of...