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

6.9K views · 147 reactions | Stanford biologist Liz Hadly says the effects of mass extinction are already apparent in California. Salmon and eagle populations have declined, and the state’s iconic grizzly bear has gone extinct. https://cbsn.ws/3GaqUzb | 60 Minutes | Facebook

43K views · 59 reactions | A mass extinction of species due to the changing climate will have cascading effects on human populations, according to the most recent IPCC report — here’s why we need to act now | NowThis Earth | Facebook

675K views · 530 reactions | At least 2 mass #extinction events in...