Is Love Actually Biological? The Truth About The 'Love' Gene

For thirty years, scientists thought they had found the exact molecular wiring behind animal love. Then, in 2023, researchers deleted the "love hormone" receptor from an animal's genome entirely — and its ability to bond with a mate didn't change at all. This video traces the real science of animal pair bonding, from Konrad Lorenz's Nobel Prize-winning imprinting research on geese, through the prairie vole studies that made oxytocin famous as "the love hormone," to a landmark 2004 experiment that used a single gene to make a promiscuous species monogamous. Then it covers the 2023 study that upended decades of assumptions, and what it means for how confidently we should talk about the neuroscience of love — animal or human. Along the way: the real "divorce rates" of over 100 bird species, why swans aren't quite as faithful as their reputation suggests, and the human brain-imaging research that connects this all back to us. In this video: • What "pair bonding" actually means, scientifically, versus "love" • The classic oxytocin and vasopressin research that built neuroscience's love-hormone story • The 2004 experiment that made a promiscuous species monogamous with one gene • The 2023 CRISPR study that upended thirty years of assumptions • The real divorce rates of swans, albatrosses, and 100+ other bird species • How human romantic-love brain scans connect back to this research January Science tells the story behind the science, one disease at a time. Subscribe for the next one.