In 2023, scientists discovered thousands of unknown life forms in the Pacific Ocean. The discovery highlighted an unsettling ...

Classification attempts to impose a hierarchy on the complex and dynamic variety of life on Earth by describing how different species group together and how they are related to one another or not.

Another definition -- one not necessarily at odds with Mayr's -- is that a species is a classification containing organisms that are physically similar. What keeps a species coherent over time?

All viewers of this document can see this public note. This is the most explicit and concise description and definition of natural selection in On the Origin of Species. Darwin’s view here is ...

The findings suggest that these species exhibit unique developmental and morphological characteristics, which have implications for conservation efforts. Taxonomic classification is critical for ...

Linnaeus' original ideas have been adapted, but continued to be accepted and as new species are identified they can be fitted into the current classification system. As more scientific equipment ...

and the proper classification of species into and among genera is now undergoing serious revision with the results of new molecular analyses. Just recently, it was suggested that the guinea pig is not ...