Commentary: Reframing Massive Carbon Input During the PETM and a Grand 66 Million Year Geoscience Puzzle

Abstract Despite decades of research, hundreds of peer‐reviewed papers, and considerable relevance to Earth's future, the rapid global warming and tremendous CO 2 input at the start of the Paleocene‐Eocene Thermal Maximum (PETM) remain highly debated. Cael and Foster (2026, https://doi.org/10.1029/2025gl120456 ) present a statistical treatment of Cenozoic benthic foraminifera (BF) stable isotope data, which confirms and confounds PETM knowledge. They show that Cenozoic BF stable isotope anomalie