Ella Cook, a 19-year-old sophomore from Mountain Brook, Ala., was a gifted pianist and spoke fluent French, a classmate said.

Few things in the universe are as perplexing as dark matter — the invisible and exotic “stuff” that is thought to make up most of the matter in galaxies. The theory goes like this: To reconcile our ...

In his more than 30-year career with the News Hour, Brown has served as co-anchor, studio moderator, and field reporter on a wide range of national and international issues, with work taking him ...

The Dark Forest theory is one proposed solution to the famed Fermi Paradox, which has bewitched astronomers for more than half a century. To put it concisely, the paradox asks if the cosmos is nearly ...

You may have black discharge with your period or due to other causes, such as infections or a missed miscarriage. If you have other symptoms, you may need immediate medical attention. Black vaginal ...

Dark energy and dark matter refers to the unseen energy and matter components of the Universe. Dark matter is invisible, non-baryonic matter hypothesized to explain phenomena including gravitational ...