The beating heart of Yellowstone National Park is without a doubt the Grand Prismatic–the largest hot spring in the US. Its colorful bands are the product of hardy bacteria and algae that live in the ...

Onlookers at one of Yellowstone National Park's most popular sites watched a large bison take its final steps into a scalding hot spring and die in a horrifying reminder of what can happen away from ...

While most people are familiar with microbes that occur above ground -- such as this orange-colored colony surrounding Grand Prismatic Spring at Yellowstone National Park -- microbes also occur around ...

See Yellowstone National Park’s most colorful hot springs from a great vantage point when you hike the Grand Prismatic Spring Overlook Trail. This easy trail takes hikers across the Firehole River ...

Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week’s contribution is from Michael Poland, geophysicist with the ...

Grand Prismatic Spring is a highlight of any visit to Yellowstone National Park! The largest hot spring in the park, the deep blue pool, is surrounded by yellow and orange algae. This is a spot you ...