WHEN Mr. Darwin published his “ Origin of Species,” he stated it to be only the forerunner of a more complete work on the subject, in which he hoped to present the evidence on which his conclusions ...

The top row shows variation in a zooplankton, Daphnia: the morph on the right is produced in the presence of a predator cue. The second row shows an example of dimorphic variation in horn length, ...

Find out which animals live the longest and what clues this gives us for potentially slowing down human aging.

Mauno Vihinen does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...

Scientists at Yale and the University of Ottawa have shown how the tiniest biochemical variation in one protein is crucial for the replication and repair of DNA in all plants and animals, they report ...

Animal breeding has traditionally focused on improving mean trait performance; however, contemporary research increasingly highlights the significance of genetic variation not only in trait means but ...

From chihuahuas to great Danes, dogs differ more in size than any other mammal species on the planet. A mutation behind such variation has been traced to an unexpected source: ancient wolves. The ...

Scientists studied puddle frogs to identify genetic variation hotspots and places where the climate crisis could wipe out populations too homogenous to adapt Even widespread species could be ...

Behavioral variation in animals is often influenced by experience. Previous studies have found that daily threatening experiences can enhance fear- and anxiety-like behaviors in some vertebrates.