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 discovered some of the oldest bony fish fossils in China. The fossils explain the early history of animals with backbones.

518-million-year-old fossil reveals vertebrates once had four eyes and extra organs that later shaped evolution.

According to the data considered by its authors—a team from the University of Sussex (UK) and Lund University ...

Learn how a second pair of eyes helped this 518-million-year-old fish evade predators. Spiders have eight eyes, bees have five, and boxed jellyfish have 24 — but these are the exceptions. The vast ...

Scarce evidence indicates that key evolutionary steps for jawed vertebrates occurred during or before the Silurian period, 444 million to 419 million years ago. Fossil finds pull back the curtain on ...

An illustration of a four-eyed myllokunmingid, a jawless fish that lived more than 500 million years ago Xiangtong Lei and Sihang Zhang Many spine-bearing creatures, or vertebrates, have a curious bit ...

Dedication to William Buckland / Christopher J. Duffin -- Introduction. Vertebrate coprolite studies : status and prospectus / Adrian P. Hunt ... [et al.] -- History of study. The earliest published ...

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 ...

A new study led by researchers at the University of Arizona suggests that for every recognized vertebrate species, there are, on average, two ...