IELTS Reading: Multiple Choice (one answer) (Practice with Answers)

Cities have become unexpected sanctuaries for bees. Surveys in Berlin, Detroit and Melbourne have found more bee species per square kilometre in some neighbourhoods than in the intensively farmed land beyond the suburbs. The reason is bleakly simple: modern monoculture offers flowering crops for two or three weeks a year, while urban gardens, neglected lots and roadside weeds bloom continuously from spring to autumn.

The bees themselves are rarely the familiar honeybee. Urban surveys repeatedly find that wild solitary species, which nest in loose soil and hollow stems, dominate city counts. Honeybees, kept by hobby beekeepers, compete with these wild species for nectar, and several ecologists have warned that well-meaning urban hives may worsen the problem they are meant to solve. A hive holds tens of thousands of workers; a solitary bee is one insect.

What cities can offer, researchers now argue, is habitat rather than havens for managed colonies. Bare patches of south-facing ground suit ground-nesting miners; dead wood left in parks feeds beetle and bee larvae alike. In Chicago, a programme that reseeded empty lots with native prairie flowers recorded wild bee numbers up by a third within four years, at a cost lower than mowing the same ground had been.

The remaining obstacle is pesticide drift. Gardens are treated privately and records are poor, so the chemicals reaching urban forage are largely unmeasured. Until that gap closes, ecologists recommend the simplest intervention available: plant more of the flowers that bloom in late summer, when nectar is scarcest, and let the wild species do the rest.

In March 2023 a room-temperature superconductor paper appeared in Nature, and by November it was retracted. The episode, involving a metallic hydride claimed to superconduct at pressures found deep inside planets, followed a pattern now familiar: startling claim, press coverage, then slow forensic dismantling by physicists working with the same data.

The dismantling mattered because the field had been here before. The lead researcher had already withdrawn one earlier superconductivity paper, and other groups attempting the compound found their samples behaved like ordinary metals. What sank this paper was narrower and stranger: the data curves, independent analysts showed, matched a type of noise pattern that does not occur in the raw signals of such experiments. The explanation that survived scrutiny was that the data had been processed in ways the authors did not fully describe.

Retractions are rarer than flaws. Most contested papers simply sit in the literature, cited and doubted at once, because retracting requires an act that scientists are structurally reluctant to perform. Journals lose a headline, authors lose years, and no one is paid to do the checking in the first place. The superconductor case ended cleanly only because the evidence of processing was unmistakable, and because the young physicists who found it posted their analysis publicly rather than through the slow official channel.

The deeper cost is measured in graduate students. A doctoral researcher who spent three years on hydride superconductors inherited not a result but a debris field, and surveys of retractions find that junior collaborators suffer career damage disproportionate to their responsibility, since their names sit on the work while their power over it sat nowhere.

The historian Eric Hobsbawm distinguished traditions that evolve from traditions that are invented, and the test cases are rarely the ones people expect. Highland dress, as worn at weddings, owes its tartan-specificity largely to nineteenth-century commercial standardisation; the kilt's ancient-clan pedigree was largely the work of two entrepreneurial brothers and a credulous public. Nothing in this embarrasses the dancers, and there lies the interesting question.

Folk revival, the deliberate resurrection or maintenance of customs, works on a spectrum of self-awareness. At one end sit practices with genuine depth, locally continuous, adapted quietly. At the other sit customs consciously staged for audiences, tourists or the nation, whose organisers know the history and proceed anyway, on the argument that meaning does not require antiquity. Between them, and most common, lies the zone of fuzzy knowledge, where participants believe partly, and belief does the work memory cannot.

Anthropologists initially treated invented tradition as fraud, a charge that itself presumed an authentic baseline. Later fieldwork complicated the verdict: revived customs, even recently minted ones, acquire community function indistinguishable from old ones, organizing seasons, marking belonging, giving teenagers a reason to stay for the weekend. The continuity, these researchers argue, is not of content but of use.

The tourism industry, meanwhile, has learned that audiences prefer their traditions pre-aged. Festival brochures reach for words like ancient and timeless regardless of facts, and the pressure runs backward into practice, encouraging communities to forget their own twentieth-century edits. Whether that forgetting matters is the live question, and it has no clean answer, only the observation that the dancers who know the history and dance anyway seem, on the evidence, to enjoy it most.