Venezuelan artist Carlos Cruz-Diez, one of the pioneers of kinetic and optical art, has died in Paris aged 95. His abstract, often geometric works are on display in many of the world’s leading museums. He used colour and lines to create dizzying displays which would change depending on the visitor’s viewpoint, and said his art “constantly changes because light constantly changes”. Carlos Cruz-Diez was born and studied in Caracas, but spent much of his career in...