This year, the launch of the Sharjah Biennial, now in its 12th iteration, marked the opening salvo of the UAE art season's busiest period. At the press preview, excited throngs of tote-bag carrying guests drifted back and forth through the narrow alleyways of Sharjah's old town, keen not to miss any of the artworks now occupying parts of the labyrinthine historical neighbourhood. Until June 5th, SB12 presents works by over 50 artists from 25 countries, loosely riffing on the theme The Past, The Present, The Possible. Here are some impressions from opening day.