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extinctions

Photograph of a rocky hillslope with two people sitting at the top, in the distance.
Posted inNews

UV Radiation Contributed to Earth’s Biggest Mass Extinction

Rachel Fritts, Science Writer by Rachel Fritts 10 February 202327 February 2023

To find the first direct evidence of heightened UV radiation during the end-Permian mass extinction, researchers turned to chemical evidence preserved in pollen grains.

Posted inEditors' Highlights

Marine Molybdenum Loss During the Toarcian Ocean Anoxic Event

by Nicolas Gruber 7 January 202327 January 2023

The reconstructed loss of molybdenum during the Toarcian ocean anoxic event suggests deeply anoxic conditions during this time period allowing massive amounts of organic carbon being buried.

Artistic interpretation in which part of Earth is seen from above, and a bright trail of light pierces clouds and ends in what looks like an explosion
Posted inNews

Impact Crater off the African Coast May Be Linked to Chicxulub

Katherine Kornei, Science Writer by Katherine Kornei 19 September 202213 October 2022

The underwater crater, spotted serendipitously in commercial observations of seafloor sediments, is believed to have formed at roughly the same time as the famous Cretaceous-Paleogene impact event.

An artist’s rendering of North America in the weeks following the Chicxulub impact shows freezing conditions and skies hazy with sulfate aerosols.
Posted inScience Updates

A Post-Impact Deep Freeze for Dinosaurs

by Aubrey Zerkle 2 September 202222 February 2023

New research supports the hypothesis that dinosaurs were done in by climate change after an asteroid impact kicked up a massive plume of sulfur gases that circled the globe for several decades.

A Velociraptor with white, black, and red feathers runs with its mouth open.
Posted inNews

Volcanic Winters Ushered in the Jurassic Reign of the Dinosaurs

Katherine Kornei, Science Writer by Katherine Kornei 31 August 202222 March 2023

Sediment cores from northwestern China reveal freezing conditions during the Late Triassic killed off many forms of life—but not dinosaurs.

Illustration of wildfire and wetland forest during the end-Permian extinction interval.
Posted inNews

A Spike in Wildfires Contributed to the End-Permian Extinction

by Jackie Rocheleau 2 August 20222 August 2022

An upward trend in fossilized charcoal indicates that wildfires may have contributed to extinctions during the Great Dying.

A tiny Arctic cod takes shelter underneath pack ice.
Posted inNews

Without Deep Emissions Cuts, Marine Species Face Mass Extinction

Rishika Pardikar, Science Writer by Rishika Pardikar 17 June 202217 June 2022

On the basis of how much oxygen marine species need and how much is available, researchers predict extinctions comparable to those at the end of the Permian under a business-as-usual emissions scenario.

Yatteyattah Nature Reserve in Australia
Posted inNews

Un nuevo modelo para un antiguo evento de extinción

by Robin Donovan 23 February 202223 February 2022

Un modelo 3D del sistema Tierra incorpora variables como la temperatura y la sulfurización para aclarar el evento de extinción de finales del Pérmico.

Yatteyattah Nature Reserve in Australia
Posted inNews

A New Model for an Old Extinction Event

by Robin Donovan 8 February 20228 February 2022

A 3D Earth system model incorporates variables such as temperature and sulfurization to shed light on the end-Permian extinction event.

Posted inEditors' Highlights

What Conditions Accompanied the Late Ordovician Mass Extinction?

by Susan Trumbore 20 January 202217 February 2023

The second-largest mass extinction in Earth’s history took place in a period of stresses from non-sulfidic anoxia in shelf areas, together with glacioeustatic sea-level change and climatic cooling.

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