A recent study shows that marine oxygen levels were crucial to the evolution of early Paleozoic trilobite body size, suggesting that oxygen may have influenced the evolution of other animals' body ...

They'd been in the collections of the Harvard Museum of Comparative Zoology (MCZ) since the 1870s when they were first discovered. Nestled in among the largest collection of trilobites, the unique ...

Add Yahoo as a preferred source to see more of our stories on Google. Richard Fortey, head of palaeontology at the Natural History Museum - Alamy ​Richard Fortey, who has died aged 79, ...

Fossils collected more than 150 years ago show that the techniques some creatures use for defensive curling have not changed in millions of years. By Jack Tamisiea When the going got tough in the ...

Five hundred million years ago, the oceans teemed with trillions of trilobites - a now extinct group of marine arthropods ruling the seas for more than 270 million years. Over 20,000 species have been ...

Rachael has a degree in Zoology from the University of Southampton, and specializes in animal behavior, evolution, palaeontology, and the environment.View full profile Rachael has a degree in Zoology ...

Hundreds of millions of years before anthropogenic climate change was ever a thing, life on Earth suffered mass extinctions due to climate change brought on by natural causes. Even so, there were ...

Fig.1: Tempo and mode in the body size evolution of Cambrian-Ordovician trilobites. Changes in maximum size (red) and mean size (blue) for each time slice, with lines and shading representing the mean ...

Researchers describe unusual trilobite fossils prepared as thin sections showing the 3D soft tissues during enrollment. The study reveals the soft undersides of enrolled trilobites and the ...

Enrollment in arthropods is an important defensive strategy that provides protection against predation. A – C, Enrolled Ceraurus from the Walcott-Rust Quarry. D – F, Enrolled Flexicalymene from the ...