Debate Over Moldy Cave Art Is a Tale of Human Missteps Although Grotta Paglicci was my original choice for #2, it's going to take longer to write up than I'd realised, and as the Washington Post have this update on the state of play at Lascaux, here's a discussion of the problems and the difficulties in finding a solution to its ailments; I'm assuming most readers will be familiar with the site, so I'm going to concentrate on the moulds that have been appearing on the walls and floors of the cave complex, as well as other factors such as the ventilation system, and the damage caused at the cave entrance; I've covered some of this in a previous post, but such is the gravity of the problems, it's worth reiterating the events and circumstances that have led up to this state of affairs; this from the linked article...
The regal black bull painted by a Stone Age artist on a cave wall in southwestern France 17,000 years ago has survived millennia of war and pestilence just a few yards above its subterranean gallery. Today the prehistoric bovine could face annihilation by an army of encroaching black mold spots, the latest in a series of threats unwittingly brought in over the years by tourists, scientists and bureaucrats.
"Each time we try to resolve one problem, we create another," said Marie-Anne Sire, the cave administrator who coordinates the scientific teams trying to save the endangered reindeer, potbellied ponies and woolly rhinos of the Lascaux cave, which contains one of the world's most famous collections of prehistoric art.
And therein lies one of the biggest problems - it seems that every time a particular treatment is used to remedy one problem, another symptom jumps up to take its place - even Dr. Greg House and his team would have their work cut out trying to cure this patient, (especially as they tend to treat humans, rather than caves), but it's going to need someone with a much greater degree of expertise than has been demonstrated so far to come up with the correct course of cures and remedies to solve this mystery. As we see...
Scientists have inherited a history of missteps and misunderstandings of the cave's inner workings from the day its owners opened it to visitors and the problems they brought. Over the decades, almost every attempt to eradicate problems has spawned new dangers. A formaldehyde foot wash, for instance, used for years to disinfect people entering the cave, ended up killing off friendly organisms that might have prevented fungus from growing.
Sire took over as cave administrator in 2002 during a white fungus outbreak that followed installation of an air-conditioning system designed to keep harmful microorganisms from taking root.
The fungus covered the floor of the caves and was creeping up the walls toward wild animals painted in brilliant hues of orange, yellow, brown and black, ground from the rocks and minerals of the surrounding area.
"I was shocked," she recalled. "It looked as though it had snowed."
Fearful that the fungus would gobble the paintings, experts poured quicklime powder on the floors and wrapped the walls in cotton bandages soaked in fungicide and antibiotics.
As soon as the white fungus began to disappear, scientists launched a major project to record the condition of every animal in the cave in a computer simulation. Two people worked 30 hours a week under lights to record every spot of fungus, every crack and every abnormality on each of the cave's creatures.
These sound like some fairly extreme measures, and I'm surprised to see absolutely no mention of the much maligned ventilation system that is thought by many to be a major source of the current woes - this story seems to have been spun in such a way that the general public are shown to the sole cause, which as far as I can tell, isn't really the case, as is apparent from this snippet at the Save Lascaux website...
However, it must be noted that Lascaux was stable and free of fungus for more than two decades until lichens were found growing in 1998. The French authorities took no action then and proceeded with the invasive installation of an ill-fitted air conditioning system in 2000 which began the huge proliferation of fungus growth inside the cave on painted and unpainted surfaces.
So for more information on that, here's how Time magazine, in a May 2006 article, 'Saving Beauty' reported on that particular aspect of the problem....
That spring, (2001) workers had finished installing a €23,000 air-conditioning system beneath the stairs leading down to the cave. The new machine was a major departure from the way Lascaux's delicate balance of temperature and humidity had been regulated for the preceding 30 years. The old system, installed in 1968 after years of minute studies of the cave's climate, relied on Lascaux's natural currents to pass air over a cold point and make sure that water condensed there, like it does on a beer can, rather than on the walls of the cave.
This passive system was only necessary during the wettest periods of the year, when it worked as a functional replacement for the earth that for millenniums had absorbed excess water from the saturated air of the cave, but that had been removed since the cave's discovery in 1940.
The new system was designed to automate the process, but also sought to improve it by using two massive high-powered fans to pull the air toward the cold point. Such an intrusive approach scandalized those who had worked so hard to figure out a more modest solution to earlier problems in the cave.
"Our idea was always to be as parsimonious as possible," says Pierre Vidal, a retired researcher who worked in Lascaux for decades. "This thing seemed more like a central air-conditioning system."
I'm not sure how the decision was reached to install this system, but apparently, and not surprisingly, nobody today is willing to admit responsibility - according to Michel de la Giraudière, whose company supplied the air-con, there was no unanimous decision over which type of system was best, and he further opines that politics played a role in that decision.
Perhaps too many people were involved in the decision-making process, and while its true that there are a great many complex issues to take into account, I have a mental image of too many people in chef's uniforms ruining the soup du jour, creating an unholy mess in the process. But there were other problems created at the cave entrance...
While a roof over the entrance was removed for the installation of the new system in early 2001, drenching rains poured directly into the cave's entrance, bringing with them dirt and, some suspect, fusarium spores. The danger that spores or other biological agents might contaminate the cave had been foreseen. Jean-François Nicolas, director of contractor Forclim Sud-Ouest Alary Vimard, says his workers were under instructions to wash their feet, limit their working hours, and stay out of the painted chambers of the cave; Desplat himself installed a padlock to insure they did so.
"We worked under the rules we were given," says Nicolas. Geneste, responsible for monitoring the work once a week with Oudin's representative, contends that wasn't always the case. "The workers often ignored us and the architect's representative and didn't disinfect their feet," says Geneste.
"They didn't keep the door closed all the time; they wanted to get the job done quickly." What's more, France's Research Laboratory of Historical Monuments (lrmh), responsible for monitoring the cave's biological condition, made no inspections during the construction work.
It seems incredible that no-one from LRMH deemed it necessary to keep an eye on proceedings, especially given the international renown of Lascaux, although in September of that year, the organisation identified the fungus Fusarium solani, an entity so deadly that affected crops have to be destroyed - and the species which invaded Lascaux was even more resistant to treatment...
Not everyone is convinced that the fungus entered the cave on the thick soles of contractors' boots. Isabelle Pallot-Frossard, director of the lrmh, says that a long-term, low-level presence of formaldehyde in the cave — ironically used as a foot wash for decades to prevent such infections — may have killed off many of the other organisms that might have prevented such an explosion of fusarium.
"The fusarium strains we found in the cave are extremely resistant to formaldehyde, unlike strains from elsewhere," says Pallot-Frossard. "It didn't come from outside, but had been there all along. All it needed was a slight modification in climate to take off."
And therein might lie one possible solution - rather than bombard the cave interior with strong and corrosive chemicals, maybe it would be better to create a mould, or genetically modify an existing one, which could then take a hold in the cave - ideally it wouldn't cause any damage to the paintings or cave itself, but would act as a kind of biological barrier to other species of more virulent fungus; over the course of time, the environment in the cave could stabilise, and a way found to remove the 'friendly' mould in circumstances whereby none of the old horrors would return.
However, a 'fight-fungus-with-fungus' approach would take a huge leap of faith, and nobody is going to like the idea of deliberately covering the cave with a fungus of any sort, but it might be something to consider.
Another idea might be to create another patient, whilst putting the current case into a type of coma until further beneficial aid can be administered. This might require the cessation of all activity in the Lascaux cave immediately, even the manual cleaning, somehow make the cave a sealed vacuum, thus depriving it of oxygen, and presumably a suitable medium in which harmful moulds could grow.
The next step would be to find one or more caves nearby or elsewhere that were as similar as possible to Lascaux, but of no archaeological interest, and conduct experiments there - i.e. saturate the cave which harmful moulds cultured from Lascaux, treat the symptoms and note the changes, alter the mix and eventually a solution should present itself. Obviously, replicating the exact environment in Lascaux will probably be impossible, and thus a cure might be much harder to find, but it seems less risky than going into Lascaux and applying solutions with no real knowledge of what the outcome will be.
It might mean that Lascaux has to be sealed for 10, 20 or even 100 years, but it's well worth taking a long-term view rather than attempt a quick fix for political or other reasons - and as advances in fields such as microbiology etc. are made, there is good reason to hope that a permanent solution may eventually be forthcoming. Here are the closing paragrpahs form the Time article...
What doesn't exist is an independent judgment of what went wrong at Lascaux and whether it is being put right. The committee the Ministry of Culture created to perform that task includes Oudin, the architect who installed the disastrous climate system; Geneste, the curator, who accepted the plans and oversaw the installation project; Pallot-Frossard, the lab director; and all the responsible bureaucrats.
How a committee so constituted can arrive at unbiased answers is "a good question," admits Marc Gauthier, an expert on the Gallo-Roman era and the committee's chairman. But he says it's working. "Too often we've reacted to the symptoms of the problem," he says. "But for the last three years we've been reflecting and acting on the reasons." Léauté-Beasley is unconvinced. "We feel that big mistakes have happened and may still be happening," she says. "The French are dealing with them like it's their backyard, but they need to feel accountable to the rest of the world. After all, who does the past belong to?"
Lascaux's keepers are no longer using chemicals to eradicate fusarium from Lascaux: no more antibiotic patches or quicklime. But no one can be content that restorers still have to go in to pick fusarium filaments off irreplaceable paintings and run the Gregomatic on the lower walls. Geneste sees a few tiny insect colonies as evidence that a new ecological balance is slowly taking shape in the cave.
"My goal is to reopen Lascaux in 2007," says Rieu, the regional director of conservation. "If the scientists' hopes are realized, that could happen, though for very restrained numbers of visitors." Business as usual may come as a relief to the ranks of bureaucrats taught a lesson in humility by Lascaux. Whether that lesson sticks will be determined by future generations. It will be a terrible indictment of this one if it does not.
If insect colonies are returning to the cave, that might indeed be a good sign, but I'm sure they could be prevailed upon to take up residence elsewhere if the cave does need to be sealed - and they could play a vital role in the other cave used for experimental fungal treatments etc, and would be a very good indicator that treatments were having any beneficial effect or not. But it seems clear that until the problems are completely understood, and the situation brought fully under control, it's probably better to keep activity therein, human or otherwise, to an absolute minimum.
The Cave of Lascaux
Save Lascaux
Time - Saving Beauty
image from washingtonpost.com