Photo taken on April 8, 2009 shows the replica of 3.2 million-year-old humanoid fossil known as "Lucy" in the National Museum in Addis Ababa, capital of Ethiopia. "Lucy" was found in Afar region by U.S. paleontologists in 1974. She was named after the Beatles' song "Lucy in the Sky with Diamonds", which was played by the paleontologists all night after she was found. The scientists believed that the ancestors of human beings may walk upright before their brain enough evolved, as "Lucy"'s brain size is only 400 ml. (Xinhua/Deng Jian)
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