This photo shows the exposure of the Mount Jackson Rhyolite Series vitrophyre at Gibbon River. Boulders of weathered, lichen-covered rock show how easy it is to overlook these new units. (Photo by Liv ...

The breathtaking beauty of Yellowstone National Park and its stunning hydrothermal features may have you exclaim: "Hold on to your hats!" The U.S. Geological Survey asks you to take that literally.

28 July 2026 – 5 days for US$4,995* per person (*based on 2025 prices, subject to increase). Step into one of the most wildlife-rich landscapes in the continental US, the iconic Lamar valley of ...

Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from Richard Tollo, emeritus professor of ...

Geologists at Yellowstone National Park have pulled more than 300 lost hats from the famous hot springs. The headwear, estimated to be worth over $6,000, is among a range of items collected so far ...

Far beneath the forests and hot springs of the American West, the continent’s largest active volcanic system is rumbling in ...

Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from James Mauch, geologist with the ...

Untold numbers of scientists have explored and analyzed the history of Yellowstone National Park’s famous geology, flora and fauna. They’ve written books and papers, given talks and penned newspaper ...

Far beneath Yellowstone’s steaming pools and geysers, a swarm of tiny earthquakes has jolted a hidden ecosystem into overdrive. Instead of simply cracking rock, the shaking appears to have stirred up ...

A hydrothermal explosion sent visitors at Yellowstone National Park running for safety on Tuesday, damaging the boardwalk but causing no immediate injuries, USA TODAY reports. So, did the explosion ...