Hummingbirds are fascinating little birds found all over the Americas. They are known for their beautiful colors, aerial ...

TEXAS, USA — Scientists at The University of Texas at Austin have discovered what may be the first vertebrate hybrid created by climate change, after two bird species expanded their ranges and met in ...

Earth’s vertebrate diversity may be far richer than anyone realized. A sweeping analysis of more than 300 studies suggests that for every known fish, bird, reptile, amphibian, or mammal species, there ...

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.