What On Earth is That?! 7 Bizarre Phenomena Happening Right Now!

6. Grand Prismatic Spring

Located in Yellowstone National Park, this is the largest hot spring in the U.S. and looks like a giant, vibrant rainbow painted on the ground. Its spectacular colors—deep blue in the center, transitioning to green, yellow, orange, and red around the edges—are caused by heat-loving bacteria (thermophiles) that thrive in the mineral-rich, super-hot water. The color bands change depending on the temperature gradient around the spring.

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