mass+prehistory

"So-called Pulses are times of sudden, catastrophic events like asteroid impacts, whereas Presses are periods of multigenerational stress on ecosystems, such as massive volcanic eruptions."

events environment earth change history climate mass biosphere prehistory extinctions catastrophic

"...species diversity and environmental changes were "decoupled" long before the extinction. Conditions on the planet were deteriorating long before species began to die off ... casting

earth species environmental mass prehistory extinction permian triassic degradation