When interstellar object 3I/ATLAS was scanned for alien technology, scientists ran the most sensitive search ever attempted.
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Alien probe or ancient ice? The enigma of 3I/ATLAS

This is not the first time that a comet is accusing it of being a spy. However, 3I/ATLAS, which was introduced on July 1, ...
This new propulsion system could rewrite the rules of spaceflight—not to mention completely defy conventional physics.