These cataclysmic explosions spray intense radiation and beams of energy through the universe at close to the speed of light.

The U.S. hasn’t detonated a nuclear weapon since 1992. Now a fusion start-up whose co-founders include former national lab ...

To those who, during the preceding year, shall have conferred the greatest benefit to humankind.”— From Alfred Nobel’s 'Last ...

For more than a decade, conservative activists held that a single atomic bomb could, without killing Americans directly, lay ...