Why? Well, his theory was that the Polynesian Islands were settled by people who sailed there from Peru on flimsy rafts made of balsa wood. And how else could you find out if such a thing was possible? Now, you'd think that assembling a crew to sail 4,300 miles on a raft made of model airplane material would be tough, but Thor was so ballsy that he advertised with this simple message:
"Am going to cross the Pacific on a simple raft to support a theory ... Will you come? Reply at once."
"Must enjoy long walks on beach, spitting in God's eye."
For all anyone knew, the theory could have been "People are stupid" or "Humans resort to cannibalism faster than you'd think," but five brave people joined up anyway. Heyerdahl named his danger-raft the Kon-Tiki, which is either the name of the Inca sun god or Norwegian for "suicidal," depending on who you ask. The raft itself was nothing more than "nine balsa wood tree trunks lashed together with hemp rope."
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"Look at this boat. The ocean wouldn't dare f**k with us."