That was all Tuesday. The next day, Michael Phelps competed in the two hundred meter butterfly.

VOA: special.2009.08.01

Fifty-two butterfly species saw populations decline in 2012 compared with 2011, with 13 experiencing their worst year in records dating back to 1976.

BBC: Butterflies suffered in cold and wet 2012, says charity

In London Mr Hirst presides over two large industrial units producing the butterfly-wing pictures and his photo-realist paintings.

ECONOMIST: Damien Hirst

Push a button and the ballerina's tutu becomes the wings of a butterfly that flutter along two arcs of numerals.

WSJ: The Face of Watchmaking's Future at SIHH and GTE