The earliest stars in the universe formed not only as individuals, but sometimes also as twins, according to a paper published today in Science Express.

When the going gets tough, the tough turn to science. And the recent revitalization of U.S. science has brought new projects—and jobs—to SLAC National Accelerator Laboratory. As a result, we need you!

Move over, silicon—it may be time to give the Valley a new name.

True muonium, a long-theorized but never-seen atom, might be observed in future experiments, thanks to recent theoretical work by researchers at the Department of Energy's SLAC National Accelerator Laboratory and Arizona State University.

The world's brightest X-ray source sprang to life last week at the U.S. Department of Energy's SLAC National Accelerator Laboratory.

SLAC National Accelerator Laboratory is home to a two-mile linear accelerator—the longest in the world. Originally a particle physics research center, SLAC is now a multipurpose laboratory for astrophysics, photon science, accelerator and particle physics research.

With the greatest total energy, the fastest motions, and the highest-energy initial emissions ever before seen, a gamma-ray burst recently observed by the Fermi Gamma-ray Space Telescope is one for the record books.

Physicists have set a new world record for the smallest writing, with features of letters as small as 0.3 nanometers, or roughly one third of a billionth of a meter.

A keystone of evolutionary history, the Thermopolis Archaeopteryx fossil, has come to the U.S. Department of Energy's (DOE) SLAC National Accelerator Laboratory to undergo a revolutionary type of analysis.

About three times a second, a 10,000-year-old stellar corpse sweeps a beam of gamma-rays toward Earth. This object, known as a pulsar, is the first one known to "blink" only in gamma rays, and was discovered by the Large Area...