“Which side are you on?” sings Florence Reece, an icon of the miners’ movement in Harlan County, Kentucky, with a brittle voice into the microphone at a union rally. Barbara Kopple’s long-term observation of the 1973 Brookside strike might even be called a music film. Because aside from Reece’s classic strike anthem, song and speech, folklore and politics, rhythms of speaking and editing are combined throughout: a successful attempt at partisanship that appeals to all the senses, where slogans are absent – or put into song. “Harlan County, USA” was presented in a special screening at the Leipzig Dokumentarfilmwoche in autumn 1977, its fame having preceded it: It had already won the Oscar for Best Documentary Film in April of that year.

This experimental animation shows the enigmatic shapes and colours of cultured crystals. Their production, once an indispensable basic process of material science and research, has lost its scientific usefulness today. But the beauty of the resulting objects has no expiry date. Enlarged, sorted and arranged, the crystals become art.