Erwin Hapke's secret museum09/23/2016September 23, 2016He lived as a recluse for decades, and in the privacy of his home the German biologist Erwin Hapke folded hundreds of thousands of models from paper and metal: the fascinating legacy of a recluse.https://p.dw.com/p/1K72MImage: WDRAdvertisementHow international is the Oktoberfest?To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video