A hidden battle of torques 3,000 miles beneath your feet decides whether today runs long or short.

Scientists may have solved why the length of Earth’s day changes by a few milliseconds over decades. Subtle shifts in the ...

For practical purposes, we say that one day—the time it takes for Earth to rotate once on its axis—equates to 24 hours. In ...

Scientists have discovered a hidden force deep inside Earth that is changing the length of our days.

What the research is about Earth's inner core is thought to consist mainly of iron, yet many questions remain about its ...

The new map highlights six regions that had been poorly sampled by PKP precursor studies and now appear to be promising ...

But the Z machine is crucial for Clark’s work. She suggests that during the early, chaotic days of Earth’s formation, melted ...

Scientists proposed a novel idea on Wednesday that could solve two of the world's mysteries at once—one that passes over our heads every night, and one that sits far below our feet. The first mystery ...

Variations in day length that occur on multidecadal timescales are caused by gravitational coupling between Earth’s inner core and its solid mantle.