For decades, scientists have tried to build a device even more precise than an atomic clock, which keeps time using electrons, the negatively charged particles that whiz around in an atom. Now, two ...

For more than 50 years, people around the world have reported a low-frequency hum. It was unique to coastal U.K. cities at first, but spread throughout the world. Theories suggest it could be factory ...

Two teams of physicists have made the world’s first nuclear clocks. These radical new devices keep time using fluctuations in the energy states of an atom’s nucleus, rather than those of its electrons ...

The twice-yearly ritual has roots in cost-cutting strategies of the late 19th century. A recent effort to end it has stalled in Congress. By Alan Yuhas Hello. You may be here to learn when daylight ...

Here’s what you’ll learn when you read this story: For more than 50 years, people around the world have reported a low-frequency hum. It was unique to coastal U.K. cities at first, but spread ...

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