The dinosaurs first appeared on Planet Earth around two hundred and forty five million years ago. That's a staggeringly long time in human terms, but geologically, the dinosaurs were effectively ...

The early Paleozoic is an ideal period for testing the relative importance of oxygen levels and other environmental mechanisms on body size, due to environmental fluctuations in marine oxygen ...

Learn more about a time period marked by an intense burst of evolution. 3 min read The Cambrian period, part of the Paleozoic era, produced the most intense burst of evolution ever known. The ...

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&#39 ...