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Cambrian

Magnified black-and-white images of two fossils.
Posted inResearch Spotlights

Fluid Dynamics of Tiny, Ancient Marine Animals

Sarah Stanley, Science Writer by Sarah Stanley 2 November 202217 February 2023

Water flow simulations using 3D models of fossils yield new clues to the evolution of organisms known as medusozoans.

Plot showing a compilation the virtual dipole moment of the geomagnetic field during the Ediacaran and Cambrian periods.
Posted inEditors' Highlights

A Dipole Field from the Ediacaran-Cambrian Transition Onward?

by Mark J. Dekkers 14 October 202114 March 2023

The Ediacaran features an instable magnetic field complicating paleogeographic reconstructions; a new paleointensity study on late Ediacaran rocks indicates a weak but stable dipolar field.

A collection of globular, multicellular membrane-bearing algae from the Kuanchuanpu biota
Posted inResearch Spotlights

Multicellular Algae Discovered in an Early Cambrian Formation

by David Shultz 16 August 202130 January 2023

A new study describes eukaryotic organisms found organized in a cortex-medulla pattern in southern China’s Kuanchuanpu Formation.

A coastal cliff in Newfoundland with visibly stratified rock
Posted inNews

Geologists Have a New Tool for Reconstructing the Ancient Climate

by Clara Chaisson 15 March 202117 February 2023

A new study of seafloor sediments finds that the temperature record in the early Paleozoic corresponds to significant shifts in the diversity of life on Earth.

Scientist holds a rock with a fossil of the species Cambroraster falcatus
Posted inNews

Newly Discovered Fossil Species Named After Star Wars Starship

Jenessa Duncombe, Staff Writer by Jenessa Duncombe 30 July 201930 January 2023

The 500-million-year-old species is a distant relative of today’s crabs, spiders, and insects.

Aerial view of the Grand Canyon
Posted inNews

Did Global Glaciation Cause the Great Unconformity?

Adityarup Chakravorty, freelance science writer by Adityarup Chakravorty 9 April 201917 February 2023

In a new study, researchers make the case that large-scale glaciation during parts of the Neoproterozoic era led to extensive erosion of Earth’s crust.

Researchers digging up a Qingjiang fossil on a bank of the Danshui River
Posted inNews

Scientists Discover Pristine Collection of Soft-Tissue Fossils

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 21 March 201930 January 2023

The fossils include jellyfish, box jellies, branched algae, and sponges, which are underrepresented in or missing from other deposits.

A trilobite fossil from the Burgess Shale in British Columbia, Canada.
Posted inNews

Rocks with Soft-Tissue Fossils Share a Mineral Fingerprint

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 20 March 201830 January 2023

Discovering new resting places of these rare and information-rich fossils will be critical to understanding the largest expansion of life in Earth’s history, according to researchers.

Fossil of an Ediacaran creature
Posted inFeatures

Hunting Rare Fossils of the Ediacaran

JoAnna Wendel, freelance science writer and illustrator by JoAnna Wendel 13 November 201730 January 2023

The search for fossil imprints and casts of squishy organisms takes time, perseverance, and sometimes a sprinkle of luck.

Posted inNews

Tectonic Events May Have Triggered the Cambrian Explosion

JoAnna Wendel, freelance science writer and illustrator by JoAnna Wendel 18 November 201430 January 2023

A researcher proposes a tectonic mechanism that could have helped drive one of the biggest evolutionary events in history: the Cambrian Explosion.

A view of a Washington, D.C., skyline from the Potomac River at night. The Lincoln Memorial (at left) and the Washington Monument (at right) are lit against a purple sky. Over the water of the Potomac appear the text “#AGU24 coverage from Eos.”

Features from AGU Publications

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New Global River Map Is the First to Include River Bifurcations and Canals

15 May 202514 May 2025
Editors' Highlights

Old Forests in a New Climate

15 May 202514 May 2025
Editors' Vox

Decoding Crop Evapotranspiration

6 May 20256 May 2025
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