[Cronos]

Although the Indo-Europeans may have originated in eastern Europe

The evidence rather poitns to Central Asia or to eastern Persia-Western India.

[ZULU]

Some people now theorize it may have been northern Anatolia or even where the Black Sea now rests.
They keep trying to locate an Indo-European homeland by looking at words for trees and animals which are common in all the languages and then looking at the ranges these plants and animals occupy in common.