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 ...

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

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 ...

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

Add Yahoo as a preferred source to see more of our stories on Google. We see a. black hole illustration. It is surrounded by circles of blue and pink from its superheated accretion disc. To Earthlings ...

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 ...

Earthquakes, volcanic eruptions, shifting tectonic plates—these are all signs that our planet is alive. But what is revealed deep inside Earth surprises laymen and scientists alike: Almost 3000 ...

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

Helium-3, a rare isotope of helium gas, is leaking out of Earth's core, according to a new study. Because almost all helium-3 is from the Big Bang, the gas leak adds evidence that Earth formed inside ...