They precisely determined the absolute ages of the Katian-Hirnantian boundary (442.65+0.17/−0.23 Ma) and the Ordovician-Silurian boundary (442.33+0.34/−0.33 Ma), constraining the duration of the ...

They precisely determined the absolute ages of the Katian–Hirnantian boundary (442.65+0.17/−0.23 Ma) and the Ordovician–Silurian boundary (442.33+0.34/−0.33 Ma), constraining the duration ...

They precisely determined the absolute ages of the Katian–Hirnantian boundary (442.65+0.17/−0.23 Ma) and the Ordovician–Silurian boundary (442.33+0.34/−0.33 Ma), constraining the duration ...

The Cretaceous period is known for the K-Pg extinction event. This event happened approximately 66 million years ago. During this time, many invertebrates and large vertebrates became extinct.

Ordovician-Silurian Extinction (about 443 million years ago): Around 85% of species went extinct, likely due to a combination of a drop in sea levels and glaciation, followed by rising sea levels ...

The Ordovician-Silurian Extinction: Surviving Earth’s First Mass Die-Off. Glowing jellyfish drifting gracefully in deep blue ocean, showcasing marine life’s elegance. Photo by Irina Iriser. The ...

As reported by CNN, new data confirms 2024 as the hottest year ever, marking the first calendar year to break a significant temperature record. They caution that exceeding that level ...

There have been five mass extinction events in the history of the world: the Ordovician-Silurian Extinction, 440 million years ago; Devonian Extinction, 365 million years ago; the Permian-Triassic ...

During the Ordovician–Silurian transition, the North Qilian orogenic belt was influenced by the mass extinction, the end-Ordovician oceanic upturn, the continental shelf environment surrounded by ...