A new study explains how dense pockets of matter could have survived over an age-old cycle of multiple ‘Big Bangs.’ ...

Deep in Siberia, a vast opening in the ground is growing at an alarming pace, and scientists say it is more than just a ...

The Pisco Valley of southern Peru’s Andes Mountains features 5,200 precisely aligned ancient holes dug into the foothills. For a century, what the holes were actually used for has remained a wildly ...

A strange X-ray beacon from deep space has revived a decades-old mystery and opened a window onto one of the universe’s most violent possibilities. Astronomers now suspect that this flicker in the ...

From blood-red lakes to blacked-out islands, some of these discoveries have mystified scientists—while others have clearer ...

What’s “inside” a black hole? Are they portals to another universe, or are actually other universes in miniature? Those are fringe theories, but no one knows for certain. The incredibly heavy objects’ ...

Astronomers have decoded the hidden past of a distant red giant star by listening to tiny vibrations in its light, revealing clues of a dramatic cosmic history. The star, which quietly orbits a ...