New evidence that volcanic eruptions caused the Great Dying, a mass extinction 252 million years ago that killed off 95% of life on Earth.

When heavy rain falls over Southeast Asia and the eastern Pacific Ocean, temperatures in California's Central Valley will reach 100 degrees F (38 C) in 4 to 16 days, says a new study.

Paleontologists have named the 430 million-year-old fossil of a tentacled sea creature after horror author H.P. Lovecraft's Cthulhu monster.

A new study of fossils unearthed by Depression-era workers reveal that camels, antelopes and relatives of modern elephants and dogs were among the animals that roamed a veritable "Texas Serengeti" millions of years ago.

An EarthSky community member - Jody Kuchar - alerted us to the webcam, which is based in Wisconsin. Thank you, Jody!

In this new image from ESA's ExoMars orbiter, you can see the winding, crisscrossing tracks of hundreds of dust devils on Mars' surface.

On April 10, 2013, one of the largest non-volcanic landslides in the history of North America took place at the Bingham Canyon mine in Utah.

The trigger is usually water. Excessive rainfall can trigger landslides and mudslides because it’s heavy and adds extra weight to the land.

Solar physicists predict another weak 11-year solar cycle ahead. At the same time, they expect the coming cycle to break the trend of weakening solar activity seen over the past 4 cycles, and they add there's "no indication we are currently approaching a Maunder-type minimum in solar activity."

Fossil remains of a 4-legged whale with hooves suggest that this whale could walk on land. With a robust tail and webbed fingers, it might have propelled itself through water like an otter.