(CNN) — Stretching to the horizon, the gray-white earth rises in peaks like a well-whipped meringue petrified into mud and rock. A keen wind whips these otherworldly hills, while the land underfoot is ...

Mud baths are one of the reasons people flock to Calistoga. The unique mixture of volcanic ashes various spas in Calistoga blend are said to be healing and therapeutic. Some 8,000 years ago the Wappo ...

Scientists on the AKMA3 ocean expedition discovered an exceptional underwater feature consisting of a mud volcano in the ...

Scientists on the AKMA3 ocean expedition discovered an exceptional underwater feature consisting of a mud volcano in the middle of a large crater 80 miles south of Norway's Bear Island. The volcano ...