Cavefish Study Supports Controversial Evolutionary Mechanism.
To the classic case studies of evolution, such as Darwin’s finches and the peppered moth, a small group of researchers would now add the Mexican tetra. This small, freshwater fish…
evolution
Evolution of New Species Requires Few Genetic Changes
Only a few genetic changes are needed to spur the evolution of new species — even if the original populations are still in contact and exchanging genes. Once started, however,…