"Most of the phyla we know today we can see already in the Cambrian and the animals of the Burgess Shale," said Caron. But the fossils still look very strange. "They certainly show evidence of ...

For over a century, scientists have been puzzled by a mysterious fossil called Helmetia expansa, an ancient arthropod from ...

"Derek Briggs and I were the first people to take a kind of cladistic and cold-eyed look at the way these weird Cambrian animals interrelated. The idea they included many new phyla was not supported, ...

Scientists say these are all markers of animal consciousness, a sign that animals, from Labrador retrievers to cuttlefish to ...

Researchers formally describe Helmetia expansa, offering new insights into its anatomy, behavior and evolutionary relationships.

This was also the time when animal diversity boomed, in what is known as the “Cambrian explosion”. My team’s new research suggests that these drastic oxygen fluctuations played a crucial ...

Our study suggests a similar pattern played out in the Cambrian. Animals evolved ways to cope with the stress of fluctuating oxygen levels on the smorgasbord of the shallow seafloor shelves.