YELLOWSTONE NATIONAL PARK--If there's any doubt that more visitors to this treasure of nature check out Old Faithful than anything else, all you need to do is compare the size of the world-famous ...

Figure 1: Opaline silica nodular outcrops adjacent to Home Plate showing typical stratiform expression. On Earth, fumaroles are one manifestation of hydrothermal activity in addition to hot springs ...

After its Sept. 15 eruption, a photo shows Ear Spring hot spring in Yellowstone still boiling the next day, with rocks and other debris scattered after the ejection shot them out of the spring, ...

BILLINGS, Mont. (AP) — A surprise eruption of steam in a Yellowstone National Park geyser basin that sent people scrambling for safety as basketball-sized rocks flew overhead has highlighted a ...

Park rangers arrested a tourist after he walked onto the Old Faithful geyser and apparently urinated into it in front of hundreds of horrified tourists at Yellowstone National Park. Video of the ...

The authorities used her case to warn the public about the dangers of the park’s hot springs, geysers and steam vents. By Vimal Patel A Connecticut woman was sentenced to seven days in jail for ...

The Steamboat Geyser at Yellowstone National Park is no Old Faithful. The world’s tallest active geyser – whose major eruptions shoot water more than 300 feet into the air – is known to be ...