Rotation, rotation, rotation! Alexander Calder and his high-wire circus act

Tate Modern, London
A conversation with Mondrian in 1930 set in motion Alexander Calder’s glorious mobile sculptures – and his balletic constellations are still breathtaking todaySomehow I had relegated Alexander Calder to a world of old New Yorker cartoons, with twangly mobiles dangling over the trust-fund infant’s cot, and brightly-coloured steel sculptures lending a joshing, lumbering air to windswept corporate plazas. Calder’s datedness felt like a future we no longer