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There are numerous online videos now where UFOs react to lasers. The U.S Navy has officially declassified three UAP videos recently. Prime Minister of Defense Canada as well as Chile have both came forward. Various "ufologists" have used laser pointers for decades and many consider them an...

I am trying to choose a laser primarilly for astronomy but one that could also be used for minor engravings. I am leaning towards a green handheld laser because of visibility/focus point, but may also consider blue because I have read that it may be the more feasible at this price point. I have...