Until the U.S. government has data or samples of alien material that can be shared, the story of extraterrestrial visitors is just a story.
BBC Sky at Night Magazine on MSN
What would proof of alien life look like? Here's what scientists are really looking for
The scientific community tends to employ ‘confidence of life’ detection scales: a multi-step ‘ladder’ that begins with biosignatures.
A new batch of declassified Pentagon UFO materials is fueling fresh public fascination — but files still do not confirm ...
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