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Some have long hair, some short hair, black, blonde or red. Armin used to be blonde-brown, but now his hair is grey. Why is that? He takes a close look with a microscope and finds out. -------------------------------------------------------------- ▶️ More environmental stories: • Environmental stories ???? The page with the mouse: https://www.wdrmaus.de ???? All videos with the mouse in the media library: http://www.wdr.de/k/maus_mediathek ???? The Mouse APP: https://www.wdrmaus.de/extras/mausapp... ???? The Mouse on Instagram: / diemaus ???? The Mouse on Facebook: / diesendungmitdermaus -------------- The show with the mouse is a format aimed primarily at children. This means that certain functions such as comments are not available for these videos. #SendungMitDerMaus #factualstory #greyhair