Today's biology has an enormous impact on medicine, particularly in diagnosing disease and understanding how drugs work. Many of the possibilities for therapies or technologies foreseen by today's sc
Every human being carries, within each of his or her cells, a long history of the species. The human genome is a record of evolution that stretches back to the first Homo sapiens and to the orig
The theory of evolution can be observed anywhere—from exotic tropical rain forests to our own backyards—and is based on three main principles: heredity, variation, and selection. In the 1
