Schiefe Zähne

From Helen Chadwick’s feminist photography at Société to Rachel Harrison’s outright absurdism at Konrad Fischer Galerie

From Nina Canell's seven tonnes of mollusc shells at Berlinische Galerie to a leftist-philanthropic flower show at Isabella Bortolozzi, Claire Koron Elat previews the essential exhibitions opening in the German capital

From Rebecca Horn’s kinetic installations to Richard Sides’s matrix, assistant editor Carina Bukuts chooses the exhibitions not to miss

At Schiefe Zähne, Berlin, the artist creates an inventory of values we privately sustain but rarely admit