Maybe the Gutenberg Bible is a fake too, or perhaps the Vinland map is real. If so, Norse explorers discovered North America long before Columbus, having apparently touched base at Newfoundland, known as Vinland Insula.
In 1965, the Vinland map was celebrated as the most exciting of the 20th century's cartographic findings, but a decade later scientific research revealed that its ink contained a titanium-bearing pigment. This indicated that its ink was a 20th century ingredient inconsistent with a map claimed to date from 1440, long before Columbus's 1492 voyage.
Later research has been at odds with the resultant hoax theory. California physicists, including Dr. Thomas Cahill of the University of California at Davis, put a proton beam through the map during a 1980s experiment. X-rays were generated which revealed only minute quantities of titanium. Because of this, Dr. Cahill called for a reevaluation of the map.
According to the February 26, 1996 The Times, out of the United Kingdom, at a February symposium at Yale University, Cahill produced more evidence on the map's behalf. He told of performing the same sort of proton beam test on verifiable volumes of the map's period--including a Gutenberg Bible. All had more titanium as part of their makeup than did the Vinland Map.