[Bernard Marx]

The Germans speak an Indo European language, and we know when the Indo-Europeans first appeared and when they spread into Europe. And it is about 2 millenia after this stuff.

I'm not arguing with you, just wondering what your source is for that Indo-European date. Mine give 6000 B.C. as the earliest possible I-E date but say farming spread to the north European plain around 5000 B.C., and to western Europe and the Volga-Don region around 4500 B.C. My first thought on reading this article was "Maybe the first direct I-E evidence?"

[JasonC]

Read JP Mallory, "the search for the indo-europeans". They aren't remotely as old as 6000 BC. Some clues to spread come from linguistic survivals, e.g. similarities in pre-IE languages from opposite ends of the IE range. The main marker is burial practices. Farming on the other hand is not a marker of IE and predates it in Europe.