By the nineteenth century most plausible explanations for the Late Pleistocene extinctions had already been proposed. Today only two remain seriously considered: human activity or climate change. Epidemic disease is improbable, unable to cross such vast taxonomic and geographic boundaries. Classic cosmic impacts fail as well, since the extinctions were not globally synchronous. The pattern of losses still challenges simple explanations and invites a deeper look at the forces shaping Earth’s past

968K views · 16K reactions | The 5 Biggest Mass Extinctions in History of Our Planet | There are total 5 mass extinction in earth history. Ordovician-Silurian Extinction (Around 443 million years ago) Late Devonian Extinction (Around 360 million years ago) Permian-Triassic Extinction (Around 252 million years ago) Triassic-Jurassic Extinction (Around 201 million years ago) Cretaceous-Paleogene or KT Extinction (Around 66 million years ago) | Faisal Zulfiqar | Facebook

12K views · 320 reactions | What a find! An Allosaurus “different...

6.5K views · 5.3K reactions | At the end of the Pleistocene, Earth...

281K views · 3.9K reactions | Earth’s history includes five major mass extinctions, with up to 95% of species lost in events driven by impacts, volcanic eruptions, or potentially solar outbursts. The terminal Pleistocene extinction, though not part of the “Great Five,” saw the disappearance of North America’s megafauna, focusing on top predators and large mammals. | The Randall Carlson | Facebook