Leading Astrophysicists Says "Yes"
Quote:
The Search for Extraterrestrial Intelligence (SETI) has a low probability of success, but it would have a high impact if successful. Physicists Paul Davies and Robert Wagner of Arizona State University argue that it makes sense to widen the search to scour the Moon for possible alien artifacts. Meanwhile at Penn State, researchers propose the same search for Mars
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here - Maybe some of those youtube videos and the Ancient Aliens TV series about the subject may have a bit of truth to them after all