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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.
Geneticist Awarded Nobel Prize for Studies of Extinct Human Ancestors
Svante Pääbo has been awarded the 2022 Nobel Prize in Physiology or Medicine for studying our extinct ancestors’ DNA.
Why ‘De-Extinction’ Is Impossible (But Could Work Anyway)
Several projects are aiming to bring back mammoths and other species that have vanished from the planet. Whether that’s technically possible is beside the point.
Secrets of Early Animal Evolution Revealed by Chromosome ‘Tectonics’
Large blocks of genes conserved through hundreds of millions of years of evolution hint at how the first animal chromosomes came to be.
Mathematical Analysis of Fruit Fly Wings Hints at Evolution’s Limits
A painstaking study of wing morphology shows both the striking uniformity of individuals in a species and a subtle pattern of linked variations that evolution can exploit.
Karen Miga Fills In the Missing Pieces of Our Genome
Driven by her fascination with highly repetitive, hard-to-read parts of our DNA, Karen Miga led a coalition of researchers to finish sequencing the human genome after almost two decades.
Plasmid, Virus or Other? DNA ‘Borgs’ Blur Boundaries.
Scientists have reported large DNA structures in some archaea that defy easy categorization.