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, ...

New research sheds light on the soft undersides of trilobites, and the evolutionary mechanism that allowed these ancient arthropods to curl up their bodies for protection. The study was published in ...

The sudden burst of animal evolution about 540 million years ago may have ended as quickly as it began. Microbial life emerged on Earth 3.5 billion years ago, but it wasn’t until the Cambrian Period, ...

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 ...

Fig. 3: Phylogenetic based family-level body size evolution in Cambrian-Ordovician trilobites. (A) Ancestral state reconstruction of body size. (B) Evolutionary traitgram of trilobite body size. (C) ...

Perfectly pristine fossils might make great museum showpieces, but they are not always the most informative for paleontologists. Some of the more salient secrets of ancient life are locked inside ...

What are trilobites, and what do their fossils reveal about the growth rate of ancient trilobita? Learn how they compare to today’s slow-growing crustaceans. An animal’s size shapes the way that it ...

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 ...

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 ...