Earth

To align Coordinated Universal Time with Earth’s rotation, a second occasionally gets added to the year. That may change in 2027

The moon is Earth’s constant companion. But will that always be the case?

Our solar system is a celestial shooting gallery, chock-full of flying projectiles that one day could threaten Earth—so what can we do about it?

This “extraordinary” event was likely caused by seismic waves bouncing off Earth’s core, researchers found

Researchers have created the first high-resolution global map of the extent of one of Earth’s largest—and least visible—living networks

This earthquake may be among the biggest in the Gulf of Mexico’s history

Scientists are working to solve a mystery of Earth’s molten outer core, which lies more than 2,000 kilometers beneath our feet

Medieval poets, including a Japanese noble, provided key descriptions to track down solar events

Science writer Hanne Strager explores how the trailblazing Danish seismologist Inge Lehmann overcame self-doubt to discover that Earth has a solid inner core, overturning the long-held belief that it was liquid

Scientists are designing techniques to smash up space rocks that could be headed our way

Scientists have found the oldest direct evidence for tectonic motion on Earth by more than half a billion years

Rising sea levels are slowing Earth’s rotation, lengthening days by 1.33 milliseconds per century