powder

Students apply coloured power onto their teacher's head during Holi celebrations at a school in the western Indian city of Ahmedabad March 14, 2014. Holi, also known as the Festival of Colours, heralds the beginning of spring and is celebrated all over India.

Amit Dave/Reuters

Students apply coloured powder onto their teacher’s head during Holi celebrations at a school in the western Indian city of Ahmedabad. Holi, also known as the Festival of Colours, heralds the beginning of spring and is celebrated all over India

Hong Kong Ai Weiwei

Kin Cheung/AP

Point of discussion: staff chat in front of the latest sculpture installation from Ai Weiwei, the Chinese dissident artist. His “Baby Formula” forms a map of China with cans of milk powder at an exhibition in Hong Kong. Mr Ai’s work was inspired by the scandal over melamine-tainted milk powder in China in 2008, which was reported to have affected nearly 300,000 children and caused six babies to die from kidney problems