The evolutionary trajectories of complex traits are constrained by levels of genetic variation as well as genetic correlations among traits. As the ultimate source of all genetic variation is mutation ...

Natural selection is the process by which some organisms in a population survive and reproduce, while others do not, based on their bodies and behaviour. It is one of the processes by which species ...

An intriguing study involving walking stick insects shows how natural selection, the engine of evolution, can also impede the formation of new species. An intriguing study involving walking stick ...