Raup & Sepkoski 1982: baseline extinction rate punctuated by ~5 mass-extinction peaks (end-Permian wiped ~95% of marine species). Anthropocene debated as sixth mass extinction.
Raup & Sepkoski 1982: baseline extinction rate punctuated by ~5 mass-extinction peaks (end-Permian wiped ~95% of marine species). Anthropocene debated as sixth mass extinction.