The extent of the problem, at least at optical frequencies, has recently been catalogued by Pierantonio Cinzano and Fabio Falchi at the University of Padua, Italy, and Christopher Elvidge at the National Geophysical Data Centre in Boulder, Colorado.

ECONOMIST: Going, going, nearly gone

Giulio Fanti, a professor of mechanical engineering at Padua University in Italy and co-author of the book "The Mystery of the Shroud, " said the app will be "very useful" to the scientific community.

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