The Cambrian fossil record indicates that most animal phyla had diversified and inhabited the Earth's oceans approximately 518 million years ago. But even though chordates—the group that includes ...

The Middle Cambrian chordate known as Pikaia gracilens was once thought to be humanity’s earliest known ancestor, and the earliest known member of the phylum Chordata. Now, a new study flips this ...

The alternative text for this image may have been generated using AI. Figure 2: The amphioxus oral skeleton requires FGF-mediated signalling for formation and expresses orthologues of vertebrate ...

Experiments with simple chordate animals show how decay may make the resulting fossils seem less evolved. The consequence is to distort evidence of the evolution of the earliest vertebrates and their ...

A new study led by researchers of the University of Barcelona and the Biodiversity Research Institute (IRBio), published in the journal Molecular Biology and Evolution, proves once more that evolution ...

This animal, a member of the chordates, can regenerate all of its organs so that each piece knows exactly how to regain functioning of all its missing body systems within a short period of time. An ...

Life began on earth more than 3.5 billion years ago, but the history of humans and other vertebrates accounts for only a fraction of this timescale. Chordates (a group that includes vertebrates) and ...