How and why the Cambrian explosion occurred has been the subject of debate ever since fossils of this remarkable event were ...

Scientists have discovered a new species that lived more than 500 million years ago -- a form of ancient echinoderm that was ancestral to modern-day groups such as sea cucumbers, sea urchins, sea ...

The evolution of the sea star, sea urchin, and other echinoderms’ body shape during the Cambrian and Ordovician periods was faster and more dramatic than their ecological innovation, according to a ...

After four years of digging for fossils in a churchyard in York, Pennsylvania, amateur paleontologist Chris Haefner made an intriguing find. “I knew it was worth keeping,” he said. He posted his ...

This article was originally featured on The Conversation. After four years of digging for fossils in a churchyard in York, Pennsylvania, amateur paleontologist Chris Haefner made an intriguing find.

The complete absence of these creatures in later strata suggests they might have vanished in a mass-extinction event that ...

Fossil echinoderms, including the common Cambrian and Ordovician echinoderms figured here (Fig. 1 from Deline, et al., 2021; request permission to use here) have a rich and diverse fossil record.

The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...

All sorts of animals easily recognisable as groups alive today appeared in the fossil record, from echinoderms (starfish, sea ...

Animal life is extraordinarily diverse and complex, having colonized almost all environments on Earth—from hostile ...