The catacombs of Paris are a fascinatingly morbid historic attraction, where you go deep underground to explore passageways of meticulously arranged bones and skulls. Somewhere between 6-7 million ...

An object spotted in deep space is the strongest candidate yet for a galaxy arrested during early development. It's been named Cloud-9, and it's a mysterious object about 14.3 million light-years away ...

The mysterious substance called dark matter is intrinsically invisible. It cannot be directly observed—rather, its presence is inferred by its gravitational influence on the universe, such as binding ...

Astronomers believe they’ve uncovered the source behind mysterious cosmic signals known as fast X-ray transients (FXTs) — and it adds a grim twist to our understanding of the death of stars. Right as ...