Apparently, Italian scientists have recently decided that the Turin Shroud was created by a supernatural event. This seems an odd conclusion for scientists.
Surely our lack of understanding of a thing does not mean that same thing is of supernatural origin. It simply means we don't understand it yet.
The cloth of the Turin shroud has been carbon dated. Three seperate investigations - Oxford University, the Swiss Federal Institute of Technology and the University of Arizona - all concluded that the fabric was from the Middle Ages, somewhere between 1260 and 1390. It was woven on a perfectly ordinary loom of that era.
The real mystery surrounds the image itself, which some people insist is the face of Jesus, if only because it's a bloke with a beard. This actually only demonstrates that people choose to believe whatever is convenient or satisying to believe.
There is, however, another explanation which is rather more rational, as this video suggests. It might be noted that Leonardo da Vinci wasn't born until 1452, which means that the alleged shroud pre-dates his era. However, this doesn't discount the possibility that he bought a sheet of old cloth with which to conduct his experiment. These-days people call it shabby chic.