Learn more about a time period marked ... organisms ever to populate Earth. These familiar marine arthropods first arose about 545 million years ago in the early Cambrian and thrived throughout ...

Sprigg’s discovery proved important as a first signal that the period now called Ediacaran, not the Cambrian just following ... call a “snowball Earth.” During that time oxygen levels ...

This daily feast-and-famine cycle in oxygen availability created an intense physiological challenge for early animals, ...

Some of the best information about early animals comes from fossils dating back to the Cambrian period, which started around 541 million years ago. During this time, Earth experienced a burst of ...

New rock and paleomagnetic research give evidence for prolonged heating during the Cambrian-Ordovician tectonic consolidation of West Gondwanaland.

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 ...

The evolution of eyes could certainly have triggered an arms race during the Cambrian Period,' says Dr Ma ... present and future of life on Earth.

The Precambrian encompasses 86 percent of the history of Earth ... Cambrian period. Hadean Era (4,550-3,850 mya) The Precambrian's oldest era, the Hadean, predates most of the geologic record ...