New research from the University of St Andrews has discovered a crucial piece in the puzzle of how all animals with a ...

The film discusses the characteristics and classifications of chordates, a group of animals that includes vertebrates and some simpler forms. Key features of chordates include a pharyngeal breathing ...

Scientists have long puzzled over the gap in the fossil record that would explain the evolution of invertebrates to vertebrates. Vertebrates, including fishes, amphibians, reptiles, birds, mammals, ...

Charles Darwin proposed that evolution is driven by gradual variations in organisms that have a survival advantage in a changing environment. But University of Maryland evolutionary biologist Karen ...