These have argued that it is the oldest instance of cave art (called parietal art) in the world. The dates for charcoal in the Chauvet paintings are more than 30,000 years ago, with four different paintings generating radiocarbon ages between 30,000 and 33,000 years BP. Charcoal is not the best material for dating to begin with, the presence of very thin layers of charcoal in association with damp cave walls, mixed with other pigments, makes matters worse.
Combier and Jouve note that some charcoal drawings have given substantially more recent dates than the paintings.
Combier and Jouve favor resolving the discrepancy between these dates by accepting that the paintings involve carbon from charcoal mixed with substances that include carbon from older sources, such as minerals.
They base their strongest argument on the similar case of Candamo cave in Spain, where the stable isotope ratio of carbon-13 to carbon-12 in the paintings varies substantially from that expected from wood charcoal.
A series of experiments conducted by Italian researchers indicate the Shroud of Turin is likely authentic, but the team has not yet reached a definite conclusion.
Decades of research on Jesus' proposed burial cloth have revealed an array of conflicting ideas surrounding the shroud's authenticity.
The third was a multi-parametric mechanical test based on five different mechanical parameters linked to the voltage of the wire.
The machine used to examine the Shroud's fibres and test traction, allowed researchers to examine tiny fibres alongside about twenty samples of cloth dated between 3000 BC and 2000 AD.
A detailed critique of the treatment of the samples subjected to AMS radiocarbon dating makes it impossible to retain the very early age (36,000 cal BP) attributed by some authors to the painted and engraved figures of Chauvet cave.
By far the largest proportion of art in caves of France and Northern Spain is relatively late in time, dating to Magdalenian peoples after 18,000 years ago.
This book, co-written by Fanti and Saverio Gaeta, is the exciting account of a discovery and the story of the extraordinary historical events of the most precious and revered relic of Christianity. The book apparently documents the recent Shroud testing done by Fanti and his research team at the University of Padua and reports the results of some chemical and mechanical tests they performed which they claim "confirms that the Shroud dates back to the 1st century." A pretty powerful statement for sure, but that is not the major problem.