Strange interstellar comet speculated to be alien spacecraft is older than Solar System - Scientists say comet represents ...
A striking optical illusion resembling a floating city or alien spacecraft was captured on camera above the countryside in ...
Grain-sized remnants of alien technology may get caught in solar wind and land on plants and moons close to us ...
Add Yahoo as a preferred source to see more of our stories on Google. For decades, humanity has scoured the cosmos for any signs that we aren't alone in the universe. But now, researchers at the SETI ...
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