ScienceEuropean blackbirds threatened by virus To play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoScienceGudrun Heise05/22/2017May 22, 2017An African virus has been killing lots of blackbirds in Germany. A zoo in Prague has found an inventive way to finance itself. And - is learning a foreign language your best bet for warding off dementia and other neurological diseases?https://p.dw.com/p/2dLhqAdvertisementHost and producer: Gudrun Heise