Cats hold their tail horizontally

21st Century Breakdown is the eighth studio album by the American rock band Green Day, released on May 15, 2009, through Reprise Records. Green Day commenced work on the record in January 2006 and forty-five songs were written by vocalist and guitarist Billie Joe Armstrong by October 2007, but the band members did not enter studio work until January 2008.

The Flowers of War is a 2011 historical drama war film directed by Zhang Yimou, starring Christian Bale, Ni Ni, Zhang Xinyi, Tong Dawei, Atsuro Watabe, Shigeo Kobayashi and Cao Kefan. A Chinese-Hong Kong co-production, the film is based on a novella by Geling Yan, 13 Flowers of Nanjing, inspired by the diary of Minnie Vautrin. The story is set in Nanjing, China, during the 1937 Nanjing Massacre in the Second Sino-Japanese War. A group of escapees, finding sanctuary in a church compound, try to survive the Japanese atrocities.

Ilkka Aulis Hanski was a Finnish ecologist at the University of Helsinki, Finland. The Metapopulation Research Center led by Hanski, until his death, has been nominated as a Center of Excellence by the Academy of Finland. The group studies species living in fragmented landscapes and attempts to advance metapopulation ecology research. Hanski proposed the core-satellite hypothesis of species distributions. Metapopulation ecology itself studies populations of plants and animals which are separated in space by occupying patches.