Short-duration events with ≥50% species loss globally. 'Big Five': end-Ordovician (444 Ma), late-Devonian, end-Permian (252 Ma, ~90% loss), end-Triassic, K–Pg (66 Ma, Chicxulub). Current anthropogenic loss argued to be sixth.
Short-duration events with ≥50% species loss globally. 'Big Five': end-Ordovician (444 Ma), late-Devonian, end-Permian (252 Ma, ~90% loss), end-Triassic, K–Pg (66 Ma, Chicxulub). Current anthropogenic loss argued to be sixth.