For decades, the prevailing scientific consensus was that most of the Earth’s methane originated from biological processes—either from ancient organic matter or modern microbes. However, as we move through 2026, the focus of the deep carbon cycle has shifted significantly
When most people think about Earth’s carbon, they picture the atmosphere, oceans, forests, or fossil fuels. Carbon is often discussed in the context of climate change, emissions, and surface ecosystems. But Earth’s carbon story extends far deeper than the surface.
For decades, scientists have studied how carbon moves between Earth’s surface and interior in what is called the deep carbon cycle. Traditionally, the focus has been on carbonates, organic sediments, and volcanic outgassing. But new research suggests that the story
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