The bone fragments of Lucy, a 3.18 million year-old human ancestor which rarely leave Ethiopia, will go on display in Europe for the first time in Prague this year, the Czech premier said Tuesday. The bone fragments of Lucy, a 3.18 million year-old human ancestor which rarely leave Ethiopia, will go on display in Europe for the first time in Prague this year, the Czech premier said Tuesday. Paleontology & Fossils Phys.org – latest science and technology news stories