A bison roams in front of Castle Geyser in the Upper Geyser Basin at Yellowstone National Park, Mont., on Sept. 25, 2023. (AP Photo/Hannah Schoenbaum) A new hydrothermal pool has been discovered in ...

Ice-blue in color, warm in temperature and a little larger than a backyard hot tub, the pool is the newest known feature to ...

Castle Geyser, Upper Geyser Basin, Yellowstone National Park Cooper Hewitt, Smithsonian Design Museum. Click to open image viewer. CC0 Usage Conditions Apply Click for more information. Click to view ...

The explosion at Yellowstone National Park’s Biscuit Basin area in July is not as uncommon as you may think as one expert weighs in on if the incident possibly formed a geyser.

Castle Geyser Cone, Yellowstone National Park Smithsonian American Art Museum and its Renwick Gallery. Click to open image viewer. CC0 Usage Conditions Apply Click for more information. Click to view ...