The Midway Geyser Basin's Grand Prismatic Spring is the largest hot spring in Yellowstone and one of the largest hot springs in the world. Measuring approximately 370 feet in size and around 121 ...

How the Grand Prismatic Spring Gets Its Kaleidoscopic Colors The beating heart of Yellowstone National Park is without a doubt the Grand Prismatic Spring—the largest hot spring in the U.S.

For every Old Faithful and Grand Canyon of the Yellowstone, there's a host of other obscure places like The Gumper, Lactose ...

The gorgeous colors of Yellowstone National Park's Grand Prismatic hot spring are among the park's myriad hydrothermal features created by the fact that Yellowstone is a supervolcano -- the ...

A pair of tourists decided they wanted a closer look at Yellowstone ... hot spring, wandering off the boardwalk and ignoring warning signs to stand right on the colorful bacterial mats at Grand ...

A new study highlights how life possibly evolved prior to and during the rise of Earth’s oxygenated atmosphere.

By exploring Yellowstone's geothermal springs, scientists discovered the microbes that reveal how life adapted to harsh conditions billions of years ago.

The Grand Prismatic Spring is the most colorful place in all of Yellowstone. It is the largest hot spring in the United States and is one of the top things to see in Yellowstone National Park.

MSU scientists studied microbes in Yellowstone hot springs to understand how life adapted to increasing oxygen levels.

One volcanologist who has spent time studying the volcano said the devastation its eruption would cause would be "complete ...

Editor’s Note: This story accompanies the May 2016 issue of National Geographic magazine, devoted entirely to America’s first national park. Find more at natgeo ...