Neanderthal - Apocalypse

: Just as later human civilizations were devastated by new viruses, Neanderthals might have succumbed to pathogens brought by migrating Homo sapiens that their immune systems weren't prepared for.

: Some researchers suggest that rapid shifts in the Earth's climate turned their lush hunting grounds into barren steppes. Neanderthals were built for ambush hunting in forests, and they may have struggled to adapt to these new, wide-open landscapes. Neanderthal Apocalypse

For a deep dive into the latest scientific theories, you can explore the Neanderthal Extinction entry on Wikipedia or watch the full Neanderthal Apocalypse documentary on YouTube. : Just as later human civilizations were devastated