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A male emperor penguin keeps an egg warm at Nanjing Underwater World in Nanjing, east China's Jiangsu province, February 10, 2009. An aquarium staff member said he found a female emperor penguin laid an egg early Monday morning. It's the first emperor penguin egg laid in China. Six emperor penguins live at the aquarium, which were all brought back from Antarctica by Chinese scientists. The female emperor penguin lays one egg each time and transfers it to the male to hatch and incubate it. [CFP]