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 ...

PROF. B. SAHNI'S important observations 1 have necessitated a reconsideration of this problem. In order to review the geological evidence on the ground, an excursion was arranged to examine ...

Here you will find videos and activities about the Stone Age. Try them out, and then test your knowledge with a short quiz before exploring the rest of the collection. Narrator: Excuse me.

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 ...

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 ...

placing the fossils in an environmental context that is dramatically different from other fossil assemblages of the Cambrian ...