happened borrow movie friend knowing nothing it turned outstanding documentary journey ancient vessel across vast expanses ocean thor heyerdahl developed theory ancient incas peru managed travel thousands miles across ocean polynesia based certain relics found places certain types ancient seagoing vessels know available analysis ocean wind currents knowledge incas did fact travel undetermined amount seabr br in order test hypothesis heyerdahl crew construct vessel closely possible ancient incas available using balsa wood materials available time set lima perus capital try reach islands polynesia  miles awaybr br his theory like much ancient history impossible prove  certainty coverage journey provides strong support right film really little narration footage taken  day expedition detailed description like trials tribulations faced often wish academy award winning documentaries easier find one  years ago still interesting informative sure first released