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“A Penguin's Life” is a story of survival and reproduction in the harshest climate on Earth. Having babies is hard work anywhere, any time. Antarctica’s large emperor penguins make the perils and challenges of human parenthood look easy.  They breed and incubate in the freezing cold of deep polar winter so their chicks can be ready for life at sea after one brief season. Over millions of years, emperors have adapted to a narrow biological niche: flat, stable sea ice with few predators other than extreme cold, gulls and the vicious leopard seal that lurks offshore. They trek vast distances to hunt for fish, krill and squid, then return to nourish their chicks. Their tribulations are many, but the parents’ devotion pays off and as the ice melts away, adolescent emperors plunge into their new home, the limitless sea.