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The Skywhale, a 34m-long, 23m-high hot-air balloon sculpture by internationally-renowned artist Patricia Piccinini, is seen during a test flight near Mt. Arapiles in the southern Australian state of Victoria. Commissioned for the Centenary of Canberra, Skywhale is at least twice as big as a standard hot-air balloon, weighs half a ton and used more than 3.5km of fabric. (Ho/Centenary of Canberra/Mark Chew/www.markchew.com.au photo)