Radiocarbon dating shroud of turin
It is said to have been restored by nuns who patched the holes and stitched the shroud to a reinforcing material known as the Holland cloth.
"[The radiocarbon sample] has obvious painting medium, a dye and a mordant that doesn't show anywhere else," Mr Rogers explained.
These tests revealed the presence of a chemical called vanillin in the radiocarbon sample and in the Holland cloth, but not the rest of the shroud.
Vanillin is produced by the thermal decomposition of lignin, a chemical compound found in plant material such as flax.
"It was embarrassing to have to agree with them," Mr Rogers told the BBC News website.
The 4m-long linen sheet was damaged in several fires since its existence was first recorded in France in 1357, including a church blaze in 1532.
Trusting that Jesus was the Son of God come to earth to take on a human body, and then crucified taking on the sins of the world, to return from the dead and then to be resurrected to heaven is enough.
God does nothing without reason or plan, and I can't fathom His leaving something confusing like this. Even if it is proven that the shroud dates to c.33AD, what does that prove? It simply proves that you have a 2000-year-old burial shroud.
Fire damage He says he was originally dubious of untested claims that the 1988 sample was taken from a re-weave.
The Shroud of Turin is much older than suggested by radiocarbon dating carried out in the 1980s, according to a new study in a peer-reviewed journal.
A research paper published in Thermochimica Acta suggests the shroud is between 1,300 and 3,000 years old.
They only way any truth can be gained from the shroud is through testing it's age again - to get some measure of certainty.
David Appleyard, Halifax, UK The Shroud is one of the most intriguing antiquities in the world. Tradition has often been confirmed by scientific investigation.