Deep biosphere has endured mountain-building and erosion over hundreds of millions of years

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Add as preferred source The calcite crystals contain traces of ancient microbial activity. Credit: Henrik Drake A new study reveals that microbial life deep within Earth has persisted and repeatedly flourished through hundreds of millions of years of mountain-building and erosion. By analyzing minerals, fluids and gases from a 2.3-kilometer-deep (1.4-mile-deep) borehole in central Sweden, researchers have uncovered episodic bursts of methane-producing life linked to major geological events that shaped Scandinavia. The paper is published in the journal Communications Earth & Environment .