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The article presents quotes from evolutionary biologist Robert L. Dorit on the inadequateness of both life spans and five senses to the task of comprehension, science writer Jonah Lehrer on living in a world knotted with cause and effects, and professor Avner Cohen on the legalization of the assassination of scientists in Tehran.

Discusses evidence for the theory that modern humans may originate from a single, recent population. Finding that men all over the world have an identical stretch of DNA on their Y chromosomes; Mitochondrial DNA; Comment from Robert L. Dorit of Yale University, coauthor of a study in the May 26, 1995 issue of `Science'; Description of research.