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Evolution is the process of heritable change in populations of organisms over multiple generations. Evolutionary biology is the study of this process, which can occur through mechanisms including natural selection, sexual selection and genetic drift.
An approach to ecological interactions that integrates coevolutionary dynamics and network structure, showing that selection in mutualisms is shaped not only by the mutualistic partners but by all sorts of indirect effects from other species in the network.
Genetic rescue can be valuable for the conservation of small populations threatened by low genetic diversity, but it carries the perceived risk of outbreeding depression. Here, Weeks et al. report increased hybrid fitness in a rescued population of the mountain pygmy possum, which likely contributed to population growth following genetic rescue.
The petals of a range of flowers harbour repeated patterns of nanostructures that
show similar levels of disorder across species. This degree of disorder produces a blue
halo of scattered light that helps bees to find flowers.