Life writing is usually a conventional business, but these writers take on the job by discarding the rules, with thrilling results

For Valentine’s Day, we look at how the interweaving passions of three American greats – Cy Twombly, Jasper Johns and Robert Rauschenberg – were as mesmerising as their art

The dazzling, haunting ‘combines’ at the heart of Tate Modern’s forthcoming retrospective were part of a private game between Rauschenberg and his peers and sometime lovers, Cy Twombly and Jasper Johns

The last great masterpieces of abstract expressionism have descended on Mayfair – but this exhibition feels too market-led to let such colossal works shine

Ai Weiwei hits Britain, Turner goes to Glasgow, the Celts invade the British Museum – and Damien Hirst has a crack at curating with the opening of his own £25m gallery

Jonathan Jones: When it's hot, everybody loves a good dip. And from David Hockney's famous splash to kids in pools and ancient divers, here are the best swimming scenes yet captured by artists on canvas and mammoth tusk...