Caucasian peoples, various ethnic groups living in theCaucasus, a geographically complex area of mountain ranges, plateaus, foothills, plains, rivers, and lakes, with grasslands, forests, marshes, and dry steppes. The complex of regions harbours more than 50 separate peoples, ranging from language communities with only a few hundred speakers to large national groups numbering millions. This diversity is not of recent date.Pliny the Elder related that the Romans carried on their business there through 80 interpreters. Arab geographers called the Caucasus Jabal al-Alsun, Mountain of Languages.
What is the oldest Indo European language?: Hittite! The oldest attested Indo-European language is Hittite. There are records written in Hittite cuneiform from about 1650 BC (the Anitta text). Hittite loanwords and personal names have been found in Old Assyrian, dated as early as 2000 BC.
The book of Genesis mentions three of Adam and Eve's children: Cain, Abel and Seth. But geneticists, by tracing the DNA patterns found in people throughout the world, have now identified lineages descended from 10 sons of a genetic Adam and 18 daughters of Eve.