Seismic data captured by ocean-bottom instruments have revealed "fossilized" traces of mantle flow beneath the Pacific Ocean's oldest preserved piece of crust. The patterns of ancient flow traced in ...

Neither famous number is as simple as it first sounds. The real question is how much uncertainty each one can realistically ...

The dispute over Earth’s age reaches deeper than one scientific number. At its center is a much bigger argument about ...

Six continents, not seven? Discover why scientists classify Earth's landmasses differently. Explore Eurasia, plate tectonics, ...

New research reveals that the Moon is still undergoing geological changes, raising questions about seismic activity on its ...

These cataclysmic explosions spray intense radiation and beams of energy through the universe at close to the speed of light.

Our world is full of unsolved mysteries. Each one is a tantalizing puzzle our brightest minds have yet to solve. Here are 25 ...

Scientists discovered a rock in Papua New Guinea that plunged more than 90 kilometers beneath Earth's surface, revealing a ...

A 100-million-year-old volcanic arc in Iran holds clues to the history of a vanished ocean whose closure helped shape the Middle East.

At 12:19 pm yesterday, the earth shook at about 9 kilometers depth in the southern Tyrrhenian Sea, and the tremor was felt ...

Why are shark teeth found in the rocks of a scorching, rainless desert?It is usually impossible to find traces of an apex ...

Lord Howe Island is part of two chains of mostly submerged extinct volcanoes, running side-by-side down Australia's east ...