By comparing the images with structures that Kennedy has seen in Jordan, he believes the sites may be up to 9000 years old, but ground verification is needed.

肯尼迪通过比较他在约旦看到的类似考古遗址的照片，他认为这些考古遗迹可能有9000多年的历史，但是实地的考察还是非常必要的。

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Last month, engines were installed, ground vibration tests and flight test instrumentation verification were completed.

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The Harvard Humanitarian Initiative does research and verification of images with on-the-ground sources.

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