American shell midden at the Goddard Site in Brooklin, Maine, United States, which some authors have argued is evidence of direct contact between Vikings and Native Americans in Maine. The coin need not imply actual exploration of Maine by the Vikings, however; mainstream belief is that it was brought to Maine from Labrador or Newfoundland (where Vikings are known to have established colonies as early as the late 10th century) via an extensive northern trade network operated by indigenous peoples. If Vikings did indeed visit Maine, a much greater number and variety of Viking artifacts might be expected in the archaeological record there. Of the nearly 20,000 objects found over a 15-year period at the Goddard Site, the coin was the sole non-native artifact. The Shroud of Turin, an ancient cloth which contains an image that resembles a sepia photographic negative. The image is much clearer when it is converted to a positive image, which was discovered by photographer Secondo Pia in 1898. The actual method that resulted in this image has not yet been conclusively identified. Some claim the image depicts Jesus of Nazareth and the fabric is the burial shroud in which he was wrapped after crucifixion. Mention of the shroud first appeared in historical records in 1357. In 1988, radiocarbon dating established that the shroud was from the Middle Ages, between the years 1260 and 1390. All hypotheses put forward to challenge the radiocarbon dating have been scientifically refuted, including the medieval repair hypothesis, the bio-contamination hypothesis and the carbon monoxide hypothesis. The Tamil Bell is a broken bronze bell with an inscription of old Tamil. The bell is a mystery due to its discovery in New Zealand by a missionary. Although nobody knows for certain how the bell came to New Zealand, one possible theory is that it was dropped off by Portuguese sailors who had acquired it from Tamil traders. Prior to being discovered by the missionary, local Maori had used it as a cooking pot. Given that it was supposedly discovered generations earlier, the artifact's exact origins could not be identified. The bell is now located at the National Museum of New Zealand. Coins from the Marchinbar Island: 5 coins from the Kilwa Sultanate on the Swahili coast discovered on an Marchinbar Island in Northern Territory of Australia in 1945 alongside 4 coins from the 18th century Netherlands. The inscriptions on the coins identify