The Great Infra-Cambrian Ice Age There is considerable geological evidence for an extensive glaciation some 600 million years ago. Its end caused an alteration of climate that made possible the ...

Learn more about a time period marked by an intense burst of evolution. 3 min read The Cambrian period, part of the Paleozoic era, produced the most intense burst of evolution ever known.

In the earliest Cambrian, organisms with hard skeletons emerged, and by Cambrian Age 3, ecosystems flourished with a marked increase in animal diversity. One pivotal group in this evolutionary ...

Then, about 540 million years ago, something else changed ... dramatically. It was the time of the Cambrian Explosion, an eruption of life when Earth’s very first animals began appearing in the ...

This stunning and unique evolutionary flowering is termed the "Cambrian explosion," taking the name of the geological age in whose early part it occurred. But it was not as rapid as an explosion ...

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 ...

It's thought the final stages of Precambrian time were marked by a prolonged global ice age. This may have led to widespread extinctions, mirroring the bleak endings to the geologic periods that ...

Something dramatic happened about 500 million years ago called the Cambrian "explosion," during ... must be younger than the ...