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 ...

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, ...

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 ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. About half a ...

A new study has found the first evidence of sophisticated breathing organs in 450-million-year-old sea creatures. Contrary to previous thought, trilobites were leg breathers, with structures ...

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 ...

Among fossils, trilobites are rock stars. They are adorable (as stony arthropods go), with a segmented shape distinctive enough to be a common logo. But they’re also fascinating because there are so ...

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 ...

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 ...

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 ...