An extinction event (also known as a mass extinction or biotic crisis) is a widespread and rapid decrease in the biodiversity on Earth. Such an event is identified by a sharp fall in the diversity and abundance …

As species evolved and diversified, several major mass extinction events changed the course of life. In such events, a significant number of living species died off over a broad geographic area during a …

Feb 28, 2025 · Overall, National Park System lands contain few rock units that were deposited over the exact time interval when an extinction event occurred. The impact of extinction events on fossils …

Jul 12, 2025 · Throughout Earth’s vast history, extinction events have been powerful forces of change. These dramatic episodes wiped out vast numbers of species, reshaping the tapestry of life …

Nov 30, 2022 · There have been five mass extinction events in Earth’s history, at least since 500 million years ago. We know very little about extinction events in the Precambrian and early Cambrian …

So far, Earth has experienced five major mass extinctions. Huge volcanic eruptions, sea-level and climate changes, and massive meteorite strikes have all eliminated whole groups of organisms …

At least a handful of times in the last 500 million years, 75 to more than 90 percent of all species on Earth have disappeared in a geological blink of an eye in catastrophes we call mass...

Jul 19, 2025 · Explore the history of species loss on Earth, from the slow pace of natural extinction to the accelerated crisis driven by human activity in the modern era.

Nov 8, 2021 · There’s a scientific consensus that the planet has undergone five major mass extinction events within the last 450 million years, with each destroying 70-95% of the species of plants, …

Moreover, we have unleashed a mass extinction event, the sixth in roughly 540 million years, wherein many current life forms could be annihilated or at least committed to extinction by the end of this …