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To Defend the Genome, These Cells Destroy Their Own DNA
Under a microscope, cells in a worm embryo deliberately eliminated one-third of their genome — an uncompromising tactic that may combat harmful genetic parasites.
Selfish, Virus-Like DNA Can Carry Genes Between Species
Genetic elements called Mavericks that have some viral features could be responsible for the large-scale smuggling of DNA between species.
How Genetic Surprises Complicate the Old Doctrine of DNA
For over a century, biologists have had to contend with a complicated picture of genetics, which they’ve only recently begun to understand.
How 3D Changes in the Genome Turned Sharks Into Skates
Changes in the 3D structure of their genome gave skates and rays their distinctive winglike fins and pancake flatness.
She Tracks the DNA of Elusive Species That Hide in Harsh Places
On Mount Everest and in the Peruvian Andes, Tracie Seimon uses DNA to study how species and ecosystems respond to climate change, pathogens and other influences.
Animal Mutation Rates Reveal Traits That Speed Evolution
The first large-scale comparison of mutation rates gives insights into how quickly species can evolve.
Gene Expression in Neurons Solves a Brain Evolution Puzzle
The neocortex of our brain is the seat of our intellect. New data suggests that mammals created it with new types of cells that they developed only after their evolutionary split from reptiles.
The Cause of Depression Is Probably Not What You Think
Depression has often been blamed on low levels of serotonin in the brain. That answer is insufficient, but alternatives are coming into view and changing our understanding of the disease.
How Genes Can Leap From Snakes to Frogs in Madagascar
The discovery of a hot spot for horizontal gene transfer draws attention to the possible roles of parasites and ecology in such changes.