Pre-Columbian rafts voyaged as far as Mexico and introduced metallurgy to the civilizations of that country. Some scholars and adventurers of the 20th and 21st century have asserted that the rafts and their crews journeyed thousands of miles across the Pacific to Polynesia, most notably Thor Heyerdahl who reached Polynesia on the Kon-Tiki raft. Several other people and groups have also built rafts based on prehistoric models and undertaken trans-Pacific voyages. Balsa is the Spanish word for raft. The use of rafts for commerce on the coasts of Peru and Ecuador, from northern Chile to southern Colombia, continued until the late 19th
Erik Hesselberg Hamburg, Germany. He stayed in Germany when World War II began, so he could not return to Norway and started working as a decorator in Braunschweig. In 1945, he and his German-born wife, Liselotte (Liss) Güldner, relocated to Lillehammer, Norway. In 1947, Hesselberg lived in the village of Borre and worked as a painter. Thor Heyerdahl approached him and invited to become a navigator on the Kon-Tiki expedition. During the trip, he worked as an astronavigator and cartographer as he was the only professional sailor. He painted the large Kon-Tiki figure on the raft's main sail. Also, he drew sketches,