Exceptionally well-preserved fossils from the Cambrian period have helped fill a gap in our understanding of the origin and evolution of major animal groups alive today. A new analysis of fossils ...

This groundbreaking discovery enriches our understanding of ecdysozoan evolution and underscores the role of the fossil record in addressing key questions about early animal development.

This evolutionary tree shows Metazoa, the group that includes most animals, along with four unicellular cousins and the Holomycota, which includes fungi, as an outgroup for comparison. CREDIT ...

In groundbreaking research, a team of international scientists has uncovered key insights into the early evolution of animal ... evolved in ecdysozoan animals, a group that includes insects ...

The evolution of eyes, legs or shells also began during this major divergence of animal groups beginning over 500 million years ago. This diversification includes the mandibulates, which are one ...

The finding settles a central question about the evolution ... sister to all animals. In the quest to identify which living animals are most closely related to this sister group, scientists ...

This is what has made them such a successful and enduring group through the ages.” Exceptionally well-preserved fossils from the Cambrian period have helped fill a gap in our understanding of the ...

That includes the millions of species of insects, arachnids, and nematode worms that make up a major animal group called the ...

The story of two of the strangest animals on the planet just ... of Louisville who studies early mammalian evolution. “They are one of the defining groups of mammals,” Rougier said.

A new study tracing the evolution of same-sex sexual behavior ... and maintenance of same-sex sexual behavior using a large group of animals, the class Mammalia,” says José Maria Gómez ...

Scientists have long wondered which was the first group ... animals that, despite their name, are not closely related to jellyfish—are more complex. It would complicate our understanding of ...

The full scope and effects of anthropogenic evolution are only now coming into focus. But already we have ascertained that humans are shaping the evolutionary trajectories of animals across the ...