Weathering is essential for biological systems, beginning abiotically after Earth's formation and later influenced by microbes, plants, animals, and significantly by humans during the Quaternary period. It transforms rocks into regolith, sediments, and soil, which supports life in the critical zone and regulates global climate through CO2 sequestration. Studying weathering processes reveals how minerals transform into nutrients and clay minerals in the critical zone. Research on historical weathering in the Quaternary sediments and paleosols provides insights into provenance and climate change. Understanding weathering is important for managing rising CO2 levels, including exploring its sequestration through weathering methods. Contributions on microbial, plant, animal, and abiotic weathering (physical and chemical) in regolith, sediments, soils of Earth’s critical zone, and palaeosols are welcome.