Rather than a constant upward trajectory of evolution, it’s been billions of years of boom-and-bust cycles – first an explosion of life, and then a mass extinction of all but the most hardy hangers-on ...

A new study of ancient fossil trails pushes the origins of complex life deeper into Earth’s history, before the Cambrian Period began.

The Cambrian explosion was an extraordinary phenomenon in the evolution of life on the planet that led to the emergence of ...

In a first-of-its-kind study, Stanford researchers have measured how the abundance of ocean life has changed over the past ...

Detailed price information for Coppercorp Resources Inc (CPER-X) from The Globe and Mail including charting and trades.

The new study, published this week in Nature, confirms that these structures in an early vertebrate fish from the Ordovician period about 465 million years ago contained dentine, and ... The research ...

Originally, the researchers set out to identify the earliest vertebrate in the fossil record, seeking out fossil specimens from the Cambrian and Ordovician periods (541 million to 443 million ...

They focused first on fragmentary fossils of animals called Anatolepis, which date from the later part of the Cambrian Period, which ran from 539 million to 487 million years ago, and early in the ...

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 ...

"This could explain why fossil communities dating from the Cambrian and Ordovician periods (around 500 million years ago) are dominated by arthropods," states Nora Corthésy.