Demonstrators confront a riot police water cannon during a protest against the government in Santiago. AFP / Johan ORDONEZ

A demonstrator wearing a Guy Fawkes mask dances in front a burning barricade during a protest against the government in Santiago. AFP / Johan ORDONEZ

A Gentoo penguin (Pygoscelis Papua) swims on Half Moon island, Antarctica. AFP / Johan ORDONEZ

An Iraqi man mourns his brother during a funeral procession for anti-government demonstrators killed during protests a day earlier, in the central holy shrine city of Najaf. AFP / Haidar HAMDANI

A dead lamb lies in the veld on a farm near drought-stricken Graaff-Reinet, South Africa. REUTERS/Mike Hutchings

A child holds a placard during a 'drop dead' flashmob protest against climate change consequences at Lumpini Park in Bangkok, Thailand. REUTERS/Chalinee Thirasupa