NASA UFO probe report: there's no proof aliens exist, but they might

A yearlong NASA probe into hundreds of UFO sightings has found there was no evidence aliens were behind the unexplained phenomena, but the American space agency also could not rule out that possibility.

On the very last page of the 33-page report, NASA panel noted that "there is no reason to conclude" that extra-terrestrial sources are behind the hundreds of UAP sightings it has investigated.

The report however noted that those objects must have travelled through our solar system to get to the Earth.

Although the report did not conclude that extra-terrestrial life exists, Nasa didn't deny the possibility of "potential unknown alien technology operating in Earth's atmosphere".

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