The colors of Grand Prismatic Spring come from thermophiles: microbes that thrive in scalding water. The green is chlorophyll they use to absorb sunlight.
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The microorganisms present at the Grand Prismatic Spring are mostly extreme thermophilic bacteria and archaea. These non-spore-forming thermophiles thrive at their tolerated temperature ranges.
The Grand Prismatic Spring is one of America's more beautiful sites to look at, just don't touch as the boiling heat could likely melt skin from bone, mixing blood red into the deep blue.
The largest, and one of the most spectacular, springs in the park is the Grand Prismatic Spring. It is 90 meters (300 feet) across and 50 meters (160 feet) deep.
The wolverine is probably the rarest animal seen in Yellowstone. The US Fish and Wildlife Service: Wolverines are the largest land-dwelling member of the mustelid family and are extremely rare in the continental United States.
In October 2021, a 20-year-old woman suffered second-degree burns after she rushed into a hot spring at Yellowstone while trying to rescue her dog. The hot spring that she entered, Maiden's Grave Spring, has an average temperature of 200 degrees Fahrenheit, per the NPS.
Always stay at least 100 yards (91 m) away from bears and wolves, and at least 25 yards (23 m) away from all other animals, including bison and elk. Hot springs have injured or killed more people in Yellowstone than any other natural feature. Keep your children close and don't let them run.