Scientists in the U.S. have built the most accurate clock in the world—so precise it can measure time down to 19 decimal ...

Jacobson/NIST After two decades of tinkering, scientists at NIST have unveiled the world’s most accurate atomic clock, a ...

For nearly a century, scientists have been trying to find dark matter—the invisible substance that seems to make up about 80% ...

Dustin Mulvaney traces the current deregulatory bonanza that the Trump administration has unleashed on public lands and waters to the Wise Use movement of the 1980s and the Sagebrush Rebellion that ...

The National Institute of Standards and Technology has set a new world record for the most accurate aluminum ion-based ...