The Grand Prismatic hot spring in Yellowstone National Park is among the park's myriad hydrothermal features created by the fact that Yellowstone is a supervolcano.
Robert B. Smith/AP
April 24, 2015 The newly discovered chamber is 4.5 times larger than the shallow reservoir already known and contains enough partially molten rock to fill the Grand Canyon 11 times.
This image was posted by NASA to the agency's official Instagram account.
October 1, 2013 In addition to shutdowns of national parks (including Alcatraz and Yosemite) and the supplemental nutrition program for women, infants and children, the mandatory furloughs are affecting a wide range of government science and health agencies.
Stefan Larsson serves up bison sloppy Joes and juniper-smoked bison tenderloin, which will be offered at the Yellowstone National Park this summer. Each park will have different menus featuring local foods.
June 7, 2013 If a family vacation to Yellowstone or the Grand Tetons makes you fear for your waistline — or for your palate — there's good news: The National Park Service is revamping its menus to offer more healthful, local and fancier fare. How does a jumbo lump crab cake or almond-baked chicken sound to you?
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December 8, 2012 A radio-collared wolf, well-known to scientists and tourists, has been killed outside Yellowstone National Park. Commentator Barbara J. King points to the larger controversy of which this latest wolf death is a part.
May 31, 2012 At Yellowstone National Park, the Earth growls, wolves prowl, bison roam and it's possible to go stand in a volcano's crater. Science bursts to life in Yellowstone. So how do we we tap Yellowstone's wonders to turn kids on to science?
Tourists watch the Old Faithful geyser, which erupts, on average, every 90 minutes in the Yellowstone National Park.
Mark Ralston/AFP/Getty Images
July 17, 2011 Celebrating one of America's great national parks — and an upcoming vacation — in photos.
August 9, 2010 Federal agents caught the second of three escaped Arizona convicts near Yellowstone National Park.
July 30, 2010 A mother grizzly responsible for leading an attack on three campers near Yellowstone was euthanized.
July 29, 2010 A female grizzly bear suspected in attacks, one of them fatal, at campsites near Yellowstone, was captured along with 2 of 3 cubs. Besides the dead camper, two were injured. The bear will be killed.
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