The first predators appeared during the Cambrian period ... the Cambrian period around 525 million years ago. These small, fish-like creatures had simple spinal cords and seemingly under-developed ...

Cambrian Period creatures known as sea moths seemed alien because of their additional eye, but a study finds anatomical ...

These familiar marine arthropods first arose about 545 million years ago in the early Cambrian and thrived throughout the world's oceans until they were wiped out in the Permian extinctions about ...

A fossil analysis suggests that the yunnanozoan, a wormlike fish that flourished ... of vertebrates into the early Cambrian,” he says, as yunnanozoan fossils predate the time vertebrates were thought ...

It has long been suspected that the sparseness of the pre-Cambrian fossil record reflects these two problems. First, organisms may not have sequestered and secreted much in the way of fossilizable ...

dramatically. It was the time of the Cambrian Explosion, an eruption of life when Earth’s very first animals began appearing in the fossil record — the ancestors of all major animal groups ...

It has long been suspected that the sparseness of the pre-Cambrian fossil record reflects these two problems. First, organisms may not have sequestered and secreted much in the way of fossilizable ...