Jean Bottleneck

The "Jean Bottleneck" refers to a significant reduction in genetic diversity that occurred in humans around 70,000 years ago, likely due to a catastrophic event, such as a volcanic eruption or climate change, which drastically reduced the global population. This "bottleneck" led to a limited number of surviving individuals, subsequently impacting the genetic pool of future generations. Today, many of us share common genetic traits due to this historical event, highlighting how a small population can influence the genetic makeup of an entire species over time.