The Great Collapse: How a Genetic Crisis Nearly Wiped Out Neanderthals 65,000 Years Ago
For decades, the story of the Neanderthals was told as one of long-term stability in Europe—until the arrival of Homo sapiens pushed them to the brink. However, new genetic research published in PNAS reveals a much more turbulent history. Roughly 65,000 years ago , a massive demographic disruption decimated the Neanderthal population, leaving only a single lineage to rebuild their entire world. The "Bottleneck" Event The study, which analyzed the mitochondrial DNA of ten Neanderthals across Europe, suggests that a severe climatic shift—likely a period of extreme cold during the last glacial cycle—triggered a near-total extinction. Most Neanderthal groups that had inhabited Europe for hundreds of thousands of years simply vanished. Geneticists call this a population bottleneck . Out of a diverse continent of hunter-gatherers, only one small group survived, likely huddled in a "refugium" (a climate-protected area) in what is now Southwestern ...