> ## Content Index
> Fetch the complete content index at: https://www.cascadepbs.org/llms.txt
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# What NASA Is Looking For In Yellowstone National Park
- URL: https://www.cascadepbs.org/show/untold-earth/episode/what-nasa-is-looking-for-in-yellowstone-national-park-tiqr4q/
- Published: 2024-04-02T23:16:20.000Z
- Updated: 2025-08-22T09:57:50.000Z
- Description: At 87º Celcius, the Grand Prismatic Spring is a beacon of microbial life and discovery.
- Author: Cascade PBS Staff
- Tags: Untold Earth, Season 1, Episode 7, #ZZZ_Episode_8521eb4b-e947-4e9b-9e69-1e87d2bc61ae, #episode, #ZZZ_Show_53bb3bef-6200-4947-a257-d3385486b9a0, #v1.16

The Grand Prismatic Spring is the most recognizable thermal feature of Yellowstone National Park, but some of its most fascinating features are invisible to the naked eye. Underwater exists a diverse system of microbes which scientists have been studying for decades, and have been the catalyst for life changing discoveries. Could these microbes be the key to discovering life on other planets?