Repeated occurrences of marine anoxia under high atmospheric O 2 and icehouse conditions - Jitao Chen; Shihan Li; Shuang Zhang; Terry Isson; Tais W. Dahl; Noah J. Planavsky; Feifei Zhang; Xiang-dong Wang; Shu-zhong Shen; Isabel P. Montañez (Proceedings of the National Academy of Sciences, 2025)