Discusses arthropods, a diverse group of animals characterized by jointed legs, exoskeletons, and segmented bodies. It ...

Unlike the hard exoskeletons found in many of the Cambrian fossils, the animals that lived during the Ediacaran were mostly soft-bodied, blob-shaped animals like cnidarians — a group that ...

The Cambrian explosion was an extraordinary phenomenon in the evolution of life on the planet that led to the emergence of ...