natural selection, evolution

Evidence is mounting that epigenetic marks on DNA can influence future generations in a variety of ways. But how such phenomena might affect large-scale evolutionary processes is hotly debated.

The black fur allele has fitness costs but also confers higher immunity against canine distemper virus, making mix-and-match mating key to population survival.

Researchers find that evolution can operate on extraordinarily fast timescales.

Long lambasted as junk DNA or genomic parasites, transposable elements turn out to be contributors to adaptation.

The movements of so-called jumping genes can generate the genetic diversity needed to drive evolutionary change in populations over time.  

A new study suggests that lighter colors may help these species stay cool on their long journeys, when birds are pushing themselves to their physiological limits.

Researchers are using experiments and observational studies to look for host genetic variation that could be partly determined by the gut microbiota.

Bacteria that live in the digestive tracts of animals may influence the adaptive trajectories of their hosts.

In the 20th century, animals such as mules and ligers that had parents of different species were considered biological flukes, but genetic sequencing is beginning to unravel the critical role of hybridization in evolution.

An island songbird evolved into five populations of different color variants despite inhabiting territories just 10 kilometers apart.

The study of evolution requires consideration of organisms’ microbiomes.

Urban environments are driving genetic changes in resident species through multiple mechanisms, from establishing gene flow barriers to exerting novel selection pressures.

The pelvic bones of women have been shaped more by random evolution than by natural selection, a new study finds.

A study of five far-flung human populations gives clues to adaptations to environmental pressures.

The turtle-headed sea snake is losing its stripes, and researchers suggest that the change reflects adaptation to fouled oceans.

Natural selection may be behind the dearth of Neanderthal DNA in modern humans.

Some thoughts on going to the Galápagos

The emergence of blood abnormalities, an adult ability to digest milk, and changes in our physical appearance point to the continued evolution of the human race.

Meet some of the people featured in the January 2016 issue of The Scientist.