Artist's illustration showing a star behind a shattered comet. A faraway star's mysterous dimming was most likely caused by comets, a new study suggests — though it doesn't rule out the ...

Add Yahoo as a preferred source to see more of our stories on Google. Archaeologists in Romania have uncovered portions of an ancient megastructure from around 6,200 years ago. The oak-floor building ...

Let's just call it the alien megastructure that wasn't. More than 100 researchers have released a study showing that the mysterious star KIC 8462852, better known as Tabby's Star, is almost certainly ...

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Has an advanced alien civilization built a mind-boggling megastructure around the distant star KIC 8462852? It’s extremely unlikely, but astronomers promised to get to the bottom of the cosmic mystery ...

Buried way underneath Antarctica’s ice, researchers have found an enormous, continent-sized network of basins we never knew were there until now. According to a recent study published in Nature ...

(To get an idea of how big that is, about the 455 United States, lengthwise, could fit inside this alien megastructure.) Any structure built around this star would have to be quite large to block the ...

The discovery, published in Nature Geoscience, reveals one of the largest deep-Earth structures ever mapped on the continent.

The mystery of why a distant star keeps dimming continues to baffle scientists, after a new report ruled out several "natural" explanations. The astronomical world lit up last year, after planet ...

A mysterious star whose repeated bouts of darkening might be due to "alien megastructures," according to some researchers' conjectures, may now have more than a dozen counterparts that display ...

Over the past weekend astronomers were rushing to fix their telescopes on the mysterious star which spawned the theory because it was, once again, acting strangely. Known as Tabby’s Star, or KIC ...