Answer the question at the end by quoting:

Thor Heyerdahl (Norwegian pronunciation: [tu:r 'haei@da:l]; October 6, 1914 - April 18, 2002) was a Norwegian adventurer and ethnographer with a background in zoology, botany, and geography. He became notable for his Kon-Tiki expedition in 1947, in which he sailed 8,000 km (5,000 mi) across the Pacific Ocean in a hand-built raft from South America to the Tuamotu Islands. The expedition was designed to demonstrate that ancient people could have made long sea voyages, creating contacts between separate cultures. This was linked to a diffusionist model of cultural development.
In 1955-1956, Heyerdahl organized the Norwegian Archaeological Expedition to Rapa Nui (Easter Island). The expedition's scientific staff included Arne Skjolsvold, Carlyle Smith, Edwin Ferdon, Gonzalo Figueroa and William Mulloy. Heyerdahl and the professional archaeologists who travelled with him spent several months on Rapa Nui investigating several important archaeological sites. Highlights of the project include experiments in the carving, transport and erection of the notable moai, as well as excavations at such prominent sites as Orongo and Poike. The expedition published two large volumes of scientific reports (Reports of the Norwegian Archaeological Expedition to Easter Island and the East Pacific) and Heyerdahl later added a third (The Art of Easter Island). Heyerdahl's popular book on the subject, Aku-Aku was another international best-seller. In Easter Island: The Mystery Solved (Random House, 1989), Heyerdahl offered a more detailed theory of the island's history. Based on native testimony and archaeological research, he claimed the island was originally colonized by Hanau eepe ("Long Ears"), from South America, and that Polynesian Hanau momoko ("Short Ears") arrived only in the mid-16th century; they may have come independently or perhaps were imported as workers. According to Heyerdahl, something happened between Admiral Roggeveen's discovery of the island in 1722 and James Cook's visit in 1774; while Roggeveen encountered white, Indian, and Polynesian people living in relative harmony and prosperity, Cook encountered a much smaller population consisting mainly of Polynesians and living in privation. Heyerdahl notes the oral tradition of an uprising of "Short Ears" against the ruling "Long Ears". The "Long Ears" dug a defensive moat on the eastern end of the island and filled it with kindling. During the uprising, Heyerdahl claimed, the "Long Ears" ignited their moat and retreated behind it, but the "Short Ears" found a way around it, came up from behind, and pushed all but two of the "Long Ears" into the fire. This moat was found by the Norwegian expedition and it was partly cut down into the rock. Layers of fire were revealed but no fragments of bodies. As for the origin of the people of Easter Island, DNA tests have shown a connection to South America, critics conjecture that this was a result of recent events, but whether this is inherited from a person coming in later times is hard to know. If the story that (almost) all Long Ears were killed in a civil war is true, as the islanders story goes, it would be expected that the statue-building South American bloodline would have been nearly utterly destroyed, leaving for the most part the invading Polynesian bloodline.

What did they do while there

archaeologists who travelled with him spent several months on Rapa Nui investigating several important archaeological sites.

Answer the question at the end by quoting:

Nicholas Edward Cave (born 22 September 1957) is an Australian musician, singer-songwriter, author, screenwriter, composer and occasional film actor, best known as the frontman of the rock band Nick Cave and the Bad Seeds. Cave's music is generally characterised by emotional intensity, a wide variety of influences, and lyrical obsessions with death, religion, love and violence. Born and raised in rural Victoria, Cave studied art before turning to music in the 1970s. As frontman of the Boys Next Door (later renamed the Birthday Party), he became a central figure in Melbourne's burgeoning post-punk scene.
Cave was born on 22 September 1957 in Warracknabeal, a small country town in the state of Victoria, Australia, to Dawn Cave (nee Treadwell) and Colin Frank Cave. As a child, he lived in Warracknabeal and then Wangaratta in rural Victoria. His father taught English and mathematics at the local technical school; his mother was a librarian at the high school that Nick attended. Cave's father introduced him to literary classics from an early age, such as Crime and Punishment and Lolita, and also organised the first symposium on the Australian bushranger and outlaw Ned Kelly, with whom Nick was enamoured as a child. When Cave was 9 he joined the choir of Wangaratta's Holy Trinity Cathedral. At 13 he was expelled from Wangaratta High School. In 1970, having moved with his family to the Melbourne suburb of Murrumbeena, he became a boarder and later day student at Caulfield Grammar School. He was 19 when his father was killed in a car accident; his mother told him of his father's death while she was bailing him out of a St Kilda police station where he was being held on a charge of burglary. He would later recall that his father "died at a point in my life when I was most confused" and that "the loss of my father created in my life a vacuum, a space in which my words began to float and collect and find their purpose". After his secondary schooling, Cave studied painting at the Caulfield Institute of Technology in 1976, but dropped out the following year to pursue music. He also began using heroin around the time that he left art school. Cave attended his first music concert at Melbourne's Festival Hall. The bill consisted of Manfred Mann, Deep Purple and Free. Cave recalled: "I remember sitting there and feeling physically the sound going through me."

Who were his parents?
Dawn Cave (nee Treadwell) and Colin Frank Cave.