At one point in deep prehistory, our species came shockingly close to vanishing. According to a recent genetic study published in Science, the entire human population dwindled to just around 1,280 individuals nearly 900,000 years ago, during a period of extreme climate upheaval. This bottleneck event, lasting for approximately 117,000 years, wiped out almost 99% of our ancient ancestors, yet it also marked a crucial turning point in human evolution.
Researchers used advanced genome modelling from over 3,000 modern human DNA samples to trace this population collapse. Their findings line up with a notable gap in the fossil record, offering genetic evidence of a mysterious and transformative era in our history. The cause? The mid-Pleistocene transition, a time when Earth’s climate grew harsher, with longer, colder ice ages and reduced habitable zones across Africa and beyond.
These intense environmental shifts likely pushed early humans to the edge of extinction. But somehow, a small group of resilient survivors made it through. The mystery of where they lived and how they endured such brutal conditions still fascinates scientists. Some researchers suggest that this survival pressure may have accelerated brain development, pushing forward the cognitive evolution that eventually led to modern humans.
The study also hints that this crisis may have triggered the emergence of a new hominin lineage, possibly the common ancestor of Homo sapiens, Neanderthals, and Denisovans.
Fun Fact: The number of surviving humans during this bottleneck was so low that it could have fit inside a small village—and yet from this tiny remnant, billions of humans now populate the Earth.
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