Planet Earth

The Yarlung Tsangpo Grand Canyon is Earth's largest terrestrial canyon, stretching 314 miles long and almost 20,000 feet from top to bottom at its deepest point in the Tibet Autonomous Region.

The same physics that underlie mayonnaise could help physicists corral the ultrahot plasma needed to produce nuclear fusion.

Scientists just pulled the longest hunk of Earth's mantle from beneath the ocean.

Dramatic cliffs and high plateaus are caused by the same wave triggered in Earth's middle layer when continents pull apart, a new study finds.

Researchers have discovered the world's oldest known arc-slicing fault in Australia, intensifying the debate over the origins of plate tectonics.

A new study of sapphires found in volcanic fields in Germany reveals that these beautiful blue stones form where magma and rocks from Earth's crust mix.

Earth from space A 2018 astronaut photo shows Nicaragua's active Momotombo volcano spitting out a cloud of toxic gas and steam just a few years after its latest eruption.

Weather experts talk about why the film "Twister" is often such a favorite among tornado researchers and what they think of its new stand-alone sequel, "Twisters"

"Sailors believed they grew underwater at the bottom of the Indian Ocean, and it was thought that male trees uprooted themselves on stormy nights and walked to find female trees, embracing them to pollinate their large flowers."

Wildfires can generate tornado-like fire whirls and other "unpredictable and erratic" weather. An atmospheric scientist explains how.