Learn more about a time period marked by an ... of evolution ever known. The Cambrian Explosion saw an incredible diversity of life emerge, including many major animal groups alive today.

FROM 508 MILLION YEARS AGO TO TODAYPreserved in the Burgess Shale of British Columbia, the worm Canadia spinosa was part of an explosion in biodiversity during the Cambrian period that gave birth ...

Life was flourishing ... kit enabled an unprecedented period of evolutionary experimentation -- and competition. Many forms seen in the fossil record of the Cambrian disappeared without trace.

Twenty million years after the Cambrian explosion, something lethal wiped out almost half of all sea life in the world ... in the global ocean at the major mass extinction levels,” wrote ...