As alien as these creatures seem, they are also surprisingly ... It has long been suspected that the sparseness of the pre-Cambrian fossil record reflects these two problems.

Million-Year-Old Cambrian Fossils Indicate Earliest Known Example of Predator-Prey 'Arms Race' Scientists have found evidence ...

High in Canada’s Rocky Mountains, the animals of an ancient ecosystem can be seen battling for life. The fossils of the Burgess Shale offer a glimpse at the incredible diversity of early life on ...

The earliest known primitive chordate is Pikaia gracilens, a wormlike creature that swam in middle Cambrian seas. Fossils found in the Burgess Shale of British Columbia show traces of a notochord ...

It's Pre-Cambrian - it's of an age that we now call ... to advanced segmentation," said Prof Xiao. In the past, the creatures that lived in the Ediacaran had been extremely difficult to classify.

During the Cambrian Explosion, all biological “rules” went out the window. The world’s oceans were filled with creatures testing the limits of evolution, caught in different stages of ...