owned by a participant of the Tigris expedition. Heyerdahl Vallis, a valley on Pluto, and Thor Heyerdahl Upper Secondary School in Larvik, the town of his birth, are also named after him. Google honoured Heyerdahl on his 100th birthday by making a Google Doodle. Heyerdahl's numerous awards and honours include the following: Governmental and state honours Grand Cross of the Royal Norwegian Order of St Olav (1987) (Commander with Star: 1970; Commander: 1951) Grand Cross of the Order of Merit of Peru (1953) Grand Officer of the Order of Merit of the Italian Republic (21 June 1965) Knight in the Order of Saint John of Jerusalem Knight of the Order of Merit, Egypt (1971) Grand Officer of the Order of Ouissam Alaouite (Morocco; 1971) Officer, Order of the Sun (Peru) (1975) and Knight Grand Cross International Pahlavi Environment Prize, United Nations (1978) Knight of the Order of the Golden Ark, Netherlands (1980) Commander, American Knights of Malta (1970) Civitan International World Citizenship Award Austrian Decoration for Science and Art (2000) St. Hallvard's Medal Academic honours Retzius Medal, Royal Swedish Society for Anthropology and Geography (1950) Mungo Park Medal, Royal Scottish Society for Geography (1951) Bonaparte-Wyse Gold Medal, Société de Géographie de Paris (1951) Elisha Kent Kane Gold Medal, Geographical Society of Philadelphia (1952) Honorary Member, Geographical Societies of Norway (1953), Peru (1953), Brazil (1954) Elected Member Norwegian Academy of Sciences (1958) Fellow, New York Academy of Sciences (1960) Vega Gold Medal, Swedish Society for Anthropology and Geography (1962) Lomonosov Medal, Moscow State University (1962) Gold Medal, Royal Geographical Society, London (1964) Distinguished Service Award, Pacific Lutheran University, Tacoma, Washington, US (1966) Member American Anthropological Association (1966) Kiril i Metodi Award, Geographical Society, Bulgaria (1972) Honorary Professor, Instituto Politécnico Nacional, Mexico (1972) Bradford Washburn Award, Museum of Science, Boston, US, (1982) President's Medal, Pacific Lutheran University, Tacoma, US (1996) Honorary Professorship, Western University, Baku, Azerbaijan (1999) Honorary degrees Doctor Honoris Causa, University of Oslo, Norway (1961) Doctor Honoris Causa, USSR Academy of Science (1980) Doctor Honoris Causa, University of San Martin, Lima, Peru, (1991) Doctor Honoris Causa, University of Havana, Cuba (1992) Doctor Honoris Causa, University of Kyiv, Ukraine (1993) Doctor Honoris Causa, University of Maine, Orono (1998) Publications På Jakt efter Paradiset (Hunt for Paradise), 1938; Fatu-Hiva: Back to Nature (changed title in English in 1974). The Kon-Tiki Expedition: By Raft Across the South Seas (Kon-Tiki ekspedisjonen, also known as