Learn more about a time period marked by an intense burst ... chordate is Pikaia gracilens, a wormlike creature that swam in middle Cambrian seas. Fossils found in the Burgess Shale of British ...

visitors can follow fossil evidence tracing the evolution of life during the Cambrian period — the first geological period of the Paleozoic era — which lasted from 541 million to 485 million ...

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 ...

The astonishing proliferation of new animal species in the Cambrian period was driven in part by a radical new way of fueling life’s engines: eating other animals. As predators evolved claws to ...

As alien as these creatures seem ... Recent research suggests that the period prior to the Cambrian explosion saw the gradual evolution of a "genetic tool kit" of genes that govern developmental ...

Animals living about 500 million years ago spent time on mudflats that were periodically exposed to the air. The finding suggests that some of the earliest animals were able to survive outside of ...

As alien as these creatures seem ... Recent research suggests that the period prior to the Cambrian explosion saw the gradual evolution of a "genetic tool kit" of genes that govern developmental ...

Bracketed by two ice ages, the Cambrian period produced some strange creatures. Among them were seafloor-dwelling predatory ...

But during the Cambrian period, creatures with complex body structures emerged. Scientists who study such things call this the "Cambrian explosion" because it was a period of rapid evolution.

during the Cambrian period, known as the ‘Cambrian explosion’. He explains a speculative theory that the evolution of creatures with eyes, such as trilobites, triggered the evolution of more ...