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 clock debate pops up every year as Americans ask the same question: Are we still changing clocks — or is daylight saving time about to disappear? Here's when and what to know about this year's ...

Is daylight saving time close to becoming permanent year-round? For now, the answer is yes, the clocks and time changes are still happening in 2026. But this could eventually change. Some are ...

Correction & clarification: A prior version of this story misstated the origin of the U.S. law on daylight saving time. Sunsets are earlier, the nights getting longer and the leaves are turning — ...

Gigascale Capital founder and former Meta CTO Mike Schroepfer joins CNBC's 'Squawk Box' to discuss his $250 million bet on rebuilding the physical economy for climate impact, Meta's bet on AI compute ...