Emergence of Indo-European Languages around 8000 years ago
Unraveling the Indo-European Enigma: The Indo-European puzzle may be explained by a hybrid of "farming" and "Steppe"
https://www.theguardian.com/science/2024/feb/22/disappearing-tongues-the-endangered-language-crisis
Linguistic diversity on Earth is far more profound and fundamental than previously imagined. But it’s also crumbling fast