Cerith Wyn Evans: Forms in Space … by Light (in Time) review – an optical trapeze act

The Welsh artist unveils 2km of neon suspended in mid-air – and it’s an adventure playground for the eyes

Tate Modern to host ‘once in a lifetime’ Picasso exhibition

Landmark show will focus on ‘year of wonders’ 1932, at height of painter’s affair with young lover Marie-Thérèse Walter

Tate Modern to reunite Giacometti’s plaster Women of Venice

Gathering of six sculptures for first time since they were made in 1956 will be highlight of retrospective for Swiss artist