How and why the Cambrian explosion occurred has been the subject of debate ever since fossils of this remarkable event were ...

A remarkable fossil discovery in southwest China is rewriting the story of how complex animal life began, showing that many key animal groups appeared millions of years earlier than scientists once ...

Animals are those organisms which are eukaryotic, multicellular and heterotrophic in their mode of nutrition. Except few, most animals are mobile and do not have cell wall. The two sides of the body ...

The complete absence of these creatures in later strata suggests they might have vanished in a mass-extinction event that ...