Biologists are quietly rewriting what it means to be alive, and the human body has become one of their strangest frontiers.

THE question is often asked by students as to which is the 'right' classification of a group of animals. Mr. K. H. Chapman, lecturer in zoology, Rhodes University College, Grahamstown, South Africa, ...

Figure 1: Partitioning protein space into homologous families. Functional annotation from literature is unlikely to be available for most proteins targeted in structural genomics. We simulated the ...