But the origin of a species, otherwise known as speciation, takes thousands, maybe millions of years, a fact that makes it extraordinarily difficult to study. Consequently, the process of speciation ...

This eventual process of speciation by natural selection is illustrated by a sketch drawn by Darwin in his personal notebook nearly 20 years before the Origin of Species was published (Figure 1).

The biological equivalent is "allopatric speciation," an evolutionary process in which one species divides into two because the original homogenous population has become separated and both groups ...

This hypothesis predicts that the fossil record at any one site is unlikely to record the process of speciation. If a site records that the ancestral species lived there, the new species would ...

The process of speciation—when a new species arises—often involves mutations that occur during reproduction, sometimes as a result of chromosomal rearrangements or other molecular changes in ...

Complete human, chimpanzee, bonobo, gorilla, and orangutan genomes have provided us a window into understanding the complex speciation process of these species' common ancestor. Analyses of these ...