Analysis of fossils discovered in Illinois reveals a previously unknown growth pattern and opens a new scientific debate.

A research team led by the Universitat Autònoma de Barcelona (UAB) has revealed how the genome is reorganized in 3D during ...

The sympathetic nervous system, which enables the fight-or-flight response, was thought to be present only in jawed vertebrates. Analysis of a jawless vertebrate suggests that this system might be a ...

Successful reproduction presents a fundamental evolutionary paradox: the immune system must tolerate genetically foreign sperm and embryos while maintaining ...

A better understanding of neuroimmune communication is crucial for identifying conserved and divergent mechanisms across ...

Early vertebrates such as myllokunmingids were small and lacked effective defence mechanisms compared to the large predators ...

Archaea are often mistaken as bacteria, given that both are small, single-cell organisms. However, archaea are as genetically different from bacteria as humans are from bacteria. While archaea are ...

The researchers from the HiLIFE Institute of Biotechnology, University of Helsinki compared two central bearded dragon lizards (Pogona vitticeps): a normal one and a mutant with no body scales. They ...

Scientists reveal clues about the evolutionary origin of jaws by studying the embryonic development of zebrafish -- an approach known as 'evo-devo.' Using imaging and cell tracing techniques in ...

A team of herpetologists at the Universidade Estadual de Santa Cruz just reported that a tiny frog found only in a hilltop forest in southern Bahia, Brazil, may be the smallest vertebrate in the world ...

Vertebrates have extremely different brain sizes: even with the same body size, brain size can vary a hundredfold. As a rule, mammals and birds have the largest brains in relation to their body size, ...