Academic Reading — Test 123

Reading passage

Across the low-lying wetlands of Ireland and Denmark, generations of peat cutters have made an unsettling discovery. Buried within the dark, waterlogged ground lie human remains so intact that the people who first uncovered them sometimes mistook them for recent victims of crime. These are the so-called bog bodies, the corpses of men and women who died centuries or even millennia ago, yet whose skin, hair and facial features have survived in a state that no ordinary burial could achieve. The peatlands have acted as a natural preserving agent, and the conditions that make this possible are both specific and rare. A peat bog is not simply wet ground. It is a slowly accumulating mass of partially decomposed plant matter, dominated by a group of mosses known collectively as sphagnum. As these plants grow and die, they pile up in layers that compress over thousands of years. The water that fills a bog is cold, highly acidic and almost entirely lacking in oxygen. Each of these factors works against the bacteria that would normally break a body down. Without oxygen, the microbes responsible for decay cannot function effectively, and the acidity further suppresses their activity. The low temperature slows every chemical reaction. Together, these conditions halt the usual process of decomposition almost completely. Yet preservation in a bog is selective rather than total. Sphagnum moss releases a substance that binds to the proteins on the surface of a body, effectively tanning the skin in much the same way that leather is produced. This is why bog bodies often appear brown and leathery, with skin drawn tight over the bones. The same acidic chemistry that protects the soft tissue, however, gradually dissolves bone, so that in many specimens the skeleton has softened or vanished while the skin remains. Hair, nails and the contents of the stomach are frequently preserved with remarkable clarity, but the internal mineral structure of the body is often lost. The result is a figure that looks human in outline yet has been profoundly altered by its long immersion. Two of the most celebrated finds come from Denmark. Tollund Man, discovered in 1950, was so well preserved that the lines of his face and the stubble on his chin could still be seen, and a leather cord remained around his neck, suggesting that he had been hanged. Grauballe Man, found a few years later, retained even his fingerprints, which allowed researchers to study the ridges of his hands. Ireland has produced equally striking examples, including Old Croghan Man, whose preserved arms revealed manicured nails that hinted at a life of relative privilege. Scientific analysis of such remains has yielded a wealth of detail about diet, health and the manner of death, information that written records from these distant periods simply do not provide. The reasons these individuals ended up in the bogs are debated. Many show signs of violence that appears deliberate rather than accidental, and a number were placed in the wetland with apparent care. Scholars have proposed that some were victims of ritual sacrifice, offered to the gods at a time when bogs were regarded as boundaries between the human world and the divine. Others may have been executed criminals or prisoners. Because the bodies date from a span of many centuries, it is unlikely that a single explanation accounts for all of them. What is clear is that the people of these regions returned to the same wetlands repeatedly, and that the bog held a meaning beyond the merely practical. The future of these remains is now a matter of concern. Once a body is removed from the bog, the very stability that preserved it is lost, and conservators must work quickly to prevent the tissue from drying out and cracking. Modern techniques involve treating the remains with waxes and controlled drying over many months, a process that is delicate and far from guaranteed. At the same time, the bogs themselves are disappearing. Industrial extraction of peat for fuel and horticulture, together with the draining of wetland for agriculture, has destroyed vast areas of bog across both countries. Conservationists now argue that protecting the remaining peatlands serves a double purpose, safeguarding both an irreplaceable archaeological archive and a fragile habitat that stores great quantities of carbon. Whether undiscovered bodies still lie beneath the surface is unknown, but each lost bog reduces the chance of ever finding out.