A nihilistic alien civilization sounds like one that would simply lose hope, abandon progress, and fade away. But this ...

Stretching across the sun-baked plains of southern Peru, the Nazca Lines have inspired awe, obsession, and wild speculation ...

Alien megastructures built to harvest stellar energy or alter the orbits of stars may be physically feasible, according to a ...

A growing number of researchers are raising a startling possibility: intelligent extraterrestrial life may already exist—and ...

Star Trek is packed with all sorts of alien, both on the Enterprise and throughout the final frontier, and these are the ...

Evidence of alien life or cosmic pyramid scheme? A documentary filmmaker sparked a discussion of advanced Martian civilizations after sharing footage that appeared to depict a “three-sided pyramid” on ...

Could ancient humans really have built the pyramids without extraterrestrial help? Or do such questions reveal more about modern anxieties than the past itself? The idea that aliens assisted the ...

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A photo of a three-sided Martian "pyramid" has sparked discussions on potential advanced life on the Red Planet. Evidence of alien life or cosmic pyramid scheme? A documentary filmmaker sparked a ...