Around 800,000 to 900,000 years ago, a genetic bottleneck occurred, drastically reducing the human population. This event led to the extinction of 98.7% of the population, leaving only about 1,280 individuals. The main cause was a significant climate shift called the middle Pleistocene transition, which brought longer and harsher glacial cycles. This change made it difficult for early humans to hunt, forcing them to adapt while some animals went extinct. Scientists are still studying the exact cause and timing of this bottleneck.
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