Relacionar Columnas DiscoveriesVersión en línea Speaking activity por Heydi Porras 1 2 3 4 5 The statues are known as Moai, and are an impressive tribute to the Rapa Nui people. Starting in 2005, scientists spent eight years researching the features of a 1.8-million-year-old skull. Tutankhamun’s tomb The “lost city” of Petra Explorer Hiram Bingham rediscovered the “lost” Inca citadel of Machu Picchu in Peru in 1911.