Under the most widely used system of biological classification, known as the Linnean system, every taxon is then put into a hierarchy based on its taxonomic rank. The lowest level of ranking is ...

To the point: How will we fit it into our taxonomic systems? "There is a very large void, I thought, on what an alien is and isn't," says Ward, a paleontologist and head of the university's NASA ...

ON different occasions, when studying the classification of yeasts, I have been able to appreciate how little consistency there is in the taxonomic ... of the present system of classification ...