Other life forms—the Archaea —predated cyanobacteria and other photosynthesizers. Archaea can live in the hottest, most acidic conditions in Yellowstone; their relatives are considered among the very earliest life forms on Earth.
Yellowstone’s thermophiles and their environments provide a living laboratory for scientists, who continue to explore these extraordinary organisms. They know many mysteries of Yellowstone’s extreme environments remain to be revealed.
Regardless of scientific advances, visitors and explorers in Yellowstone can still relate to something else Weed said about Yellowstone, more than a century ago:
The Yellowstone Resources and Issues Handbook, updated annually, is the book our rangers use to answer many basic park questions.
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Last updated: October 3, 2016