Menlo Park, Calif.--Scientists report today that they have taken a big step in determining what the first birds looked like more than 100 million years ago, when their relatives, the dinosaurs, still ruled the Earth.

Menlo Park, Calif.—Glass, by definition, is amorphous; its atoms lack order and are arranged every which way.

Scientists have engineered a cheap, abundant alternative to the expensive platinum catalyst and coupled it with a light-absorbing electrode to make hydrogen fuel from sunlight and water.

Scientists have found the strongest evidence yet that a puzzling gap in the electronic structures of some high-temperature superconductors could indicate a new phase of matter.

Two studies to be published February 3 in Nature demonstrate how the unique capabilities of the world’s first hard X-ray free-electron laser—the Linac Coherent Light Source, located at the Department of Energy’s SLAC National Accelerator Laboratory—could revolutionize the study of...

The Crab Nebula, one of our best-known and most stable neighbors in the winter sky, is shocking scientists with its propensity for fireworks—gamma-ray flares set off by the most energetic particles ever traced to a specific astronomical object.

In a study that could rewrite biology textbooks, scientists have found the first known living organism that incorporates arsenic into the working parts of its cells.

Calcium regulates many critical processes within the body, including muscle contraction, the heartbeat, and the release of hormones.

Secretary of Energy Steven Chu on Monday dedicated the Linac Coherent Light Source (LCLS), the world's most powerful X-ray laser, at the Department of Energy's SLAC National Accelerator Laboratory.

Dr. Jonathan Dorfan has been named president-elect of the Okinawa Institute of Science and Technology (OIST) Graduate University.