Harvard researchers traced the origins of the vast Indo-European language family to the Caucasus-Lower Volga region, identifying the ancestral population known as the Yamnaya, who appeared around 3300 BCE and spread from Hungary to western China.
A new study suggests that the wheel may have been invented by copper miners in the Carpathian Mountains around 3900 B.C., using techniques from structural mechanics to trace the evolution of the wheel and axle.
