For the first time, astronomers have probed the physical environment of repeating X-ray outbursts near monster black holes ...

ABC News contributor Father James Martin discusses the characteristics that cardinals might be looking for in the next pope.

Rare earth elements are critical to many industries—used in electric motors, medical imaging and diagnostics, oil and gas ...

See the fascinating creation of a tangible representation of the elements in this unique model of the periodic table.

The ancient Greeks looked to use the four main elements to interpret reality and the world. Empedocles was the proponent of ...