On Your Mark

[Hong Kong, April 2. Image via Getty]

An art expert explains Mark Rothko's 'Untitled' painting with a pre-auction estimate of 18 - 25 million US dollars during a Sotheby's press preview ahead of their spring sale in Hong Kong on April 2, 2010. The auction house will soon be holding its 2010 Spring Sale with 2,400 lots estimated to fetch around 167 million US dollars. AFP PHOTO/MIKE CLARKE (Photo credit should read MIKE CLARKE/AFP/Getty Images)