Genetic studies point to extreme climate changes during a prolonged glacial period around 800-900k years ago, causing droughts, habitat loss, and resource scarcity in Africa, leading to the bottleneck. It's not definitively proven, but that's the leading hypothesis.

Scientists' leading hypothesis, based on genetic evidence, points to extreme climate changes during a glacial period ~800-900k years ago, causing droughts and resource scarcity in Africa. It's not definitively proven, though.

The leading hypothesis, based on genetic studies, is extreme climate changes during a glacial period ~800-900k years ago, leading to droughts, habitat loss, and resource scarcity in Africa. It's not definitively proven, though. Fascinating stuff!

The leading hypothesis from genetic studies points to extreme climate changes during a glacial period ~800-900k years ago, causing droughts, habitat loss, and food scarcity in Africa. It's not definitively proven, but fascinating!

The leading hypothesis from genetic studies is extreme climate changes, like glaciation, droughts, and habitat loss in Africa ~800-900k years ago. It's not definitively proven, but evidence strongly suggests this caused the bottleneck. Fascinating glimpse into our past!