Darwin's rotifers

摘要

When Charles Darwin opened his 5rst notebook on the subject of how organisms change over time, the field was not even referred to as "evolution". It was, rather, "the species problem"—in other words, how did life's variety arise? Darwin showed in detail how life changes over the course of time by the process of natural selection, but failed to explain how those changes can take different courses, dividing a species in two and thus multiplying the number of species.