Avebury is one of the largest prehistoric monuments ever built in Britain. Massive stones, giant earthworks and mysterious ...

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 ...

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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 ...

How do you explain an outer space discovery that confounds even astronomers? Blame it on aliens. At least that often seems to be the first reaction when such mysteries arise. KIC 8462852 was first ...

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 ...

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 ...

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 ...

There are three ways to look for evidence of alien technological civilizations. One is to look out for deliberate attempts by them to communicate their existence, for example, through radio broadcasts ...