Systematics (or biosystematics) is the classification of living organisms into natural, ordered in a hierarchical (or layered) fashion that emphasizes their phylogenetic (or evolutionary) relationships. Systematics is related to taxonomy, although the...

The basic notions of classical physics concern particles moving in straight lines, or linear motion. The concepts of linear motion are usually grouped into two categories, kinematics and dynamics. Kinematics deals with predicting the position of a...

Polyphylogeny is a term used in the science of systematics. It describes a group of species that are classified in the same taxon, but do not share a single ancestor. Systematics is the study of biological diversity looked at through an evolutionary...

Plant systematics is a broad discipline that is often defined as the study of the kinds of organisms (both living and fossils), and of the relationships among these organisms. Thus, students and researchers in the area of systematics (termed...

Biological systematics is the study of the diversity of life on the planet Earth, both past and present, and the relationships among living things through time. Relationships are visualized as evolutionary trees (synonyms: cladograms, phylogenetic...

State Sen. Vincent J. Fumo, one of the most powerful figures in Pennsylvania politics, was indicted Tuesday on 139 federal counts alleging he used a nonprofit group for personal and political gain and defrauded the state Senate out of $1 million.Many of the charges stem...

Sam Hinga Norman, a former government minister on trial for allegedly overseeing a militia accused of torturing and mutilating civilians during Sierra Leone's decade-long civil war, died Thursday at a Senegalese hospital, a court statement said.Norman, 67, Sierra Leone's former internal affairs minister, had been...

Two former members of a pro-government militia were convicted of war crimes Thursday, the second round of rulings by a U.N.-backed court attempting to punish those most responsible for brutalities committed during Sierra Leone's decade-long civil war.Moinina Fofana and Allieu Kondewa were tried on eight...