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

All animal evolution ... the opportunity for the Cambrian explosion to occur. Internal, genetic factors were also crucial. Recent research suggests that the period prior to the Cambrian explosion ...

Dinosaurs dominated the land for 135 million years ... Its age means it falls into the geological Cambrian period, a pivotal moment for all life on Earth when complex lifeforms started to rapidly ...

Something dramatic happened about 500 million years ago called the Cambrian "explosion ... This occurred in a world without ...

During the Proterozoic era, oxygen produced by photosynthesizing bacteria collects in the oceans and then in the atmosphere. Iron present in exposed rocks reacts with this oxygen, and rust colors ...

Environmental stress in evolution can be reframed as a powerful engine of innovation, not simply a barrier to survival.

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 ...

Visitors at the Miraculous Life in the Ancient Oceans: Exhibition of Premium Fossils from the Cambrian Chengjiang Biota, held at the Natural History Museum of China in Beijing. WANG QIAN/CHINA ...