10 янв. 2023 г. · About 443 million years ago, life on Earth was undergoing the Late Ordovician mass extinction, which eliminated about 85% of marine species.

Occurring about 443.8 million years ago, the Ordovician-Silurian extinction was the first major mass extinction event. It concluded the Ordovician Period, which ...

Ordovician-silurian Extinction: 440 million years ago · Devonian Extinction: 365 million years ago · Permian-triassic Extinction: 250 million years ago · Triassic- ...

The most recent and best-known, the Cretaceous–Paleogene extinction event, which occurred approximately 66 Ma (million years ago), was a large-scale mass ... Late Ordovician mass extinction · Capitanian mass extinction event

15 нояб. 2022 г. · The earliest-known mass extinction was caused due to the diminishing availability of oxygen, leading to the loss of 80% of the animals extant then.

2 сент. 2015 г. · The world's first known mass extinction, which took place about 540 million years ago, now appears to have had a more subtle cause: evolution itself.

The Late Ordovician mass extinction (LOME), sometimes known as the end-Ordovician mass extinction or the Ordovician-Silurian extinction, is the first of the ...

7 нояб. 2022 г. · The work, led by postdoctoral associate Scott Evans, shows a major loss of diversity during the Ediacaran Period, which lasted from 635 million to 540 million ...

26 сент. 2019 г. · Some 252 million years ago, life on Earth faced the “Great Dying”: the Permian-Triassic extinction. The cataclysm was the single worst event ...