There are few more tantalizing or notorious historical documents than the Vinland map. A faded; yellowing scrap of parchment bearing a faint tracery of lines; the map apparently shows the eastern seaboard of North America-yet it was drawn at least half a century before Columbus reached the New World. It seems to present unshakeable proof that the Vikings were the real discoverers of the Americas. But for 40 years; a bitter debate over its authenticity has raged among cartographers; historians; and scientists. Despite chemical analysis and radiocarbon tests; the case remained unresolved. Now; in an exclusive investigation; NOVA presents fresh evidence confirming that the map was probably one of the cleverest forgeries of all time; and probes who might have wanted to carry out the deception. In this enthralling cartographic detective story; NOVA pursues a trail from Scandinavia to Austria; Switzerland; London; and the U.S.