You can categorize every single living being. This classification system allows scientists to study plant and animal diversity and to group closely related species. From horses to insects to worms, ...

Taxonomy is the science that attempts to categorise the many millions of species on Earth. Find out how to define taxonomy, what taxonomists do and why classifying life is so important. The definition ...

Are species constructs of the human mind? -- Why is there a species problem? -- Is the biological species a class or is it an individual? -- What are traits in taxonomy? -- Diversity within the ...