A
hot spring
is a spring that is produced by the emergence of geothermally heated
groundwater from the Earth's crust. The hot spring pools contain
microorganisms known as thermophiles, a type of extremophile. They are
organisms that exist in the most unlikely, unlivable, and extreme
places, hence their name.
The color comes from the way that these thermophiles reflect the light
of the sun. There are geothermal hot springs in many locations all over
the crust of the earth, but many of these wonderful water bodies are
concentrated in Yellowstone National Park, USA.
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