Sinking Calcium Carbonate Locked Away Greenhouse Gases, Reveals New Study
Scientists have solved a 66-million-year climate mystery, explaining how Earth cooled from a tropical greenhouse to an ice-capped world. New research reveals ocean calcium levels dropped by more than half, reshaping marine chemistry. As calcium declined, oceans locked away more carbon dioxide, lowering atmospheric CO2. The study links deep-Earth processes, ocean evolution, and marine life to long-term global climate change across geological timescales recorded in fossils and ancient seafloor rocks.
