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When studying Earth’s past, researchers want to understand how nutrients like nitrogen cycled and the impact biology had on them. Scientists rely on ancient rock, soil, fossils, and marine sediment to understand the world that used to be.  Approximately 2.5 billion years ago, oxygenic photosynthesis, the form of…

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Yellowstone National Park is famous for its hot springs, geysers, wildlife, and incredible geology. While the area is popular among visitors every year, scientists are also excited about the hot springs at this site as they create unique habitats for life. Surprisingly, this national park’s hot springs may hold clues…