Reading Test 10
An important language development
Cuneiform, the world’s first known system of handwriting, originated some 6.000 years ago in Sumer in what is now southern Iraq. It was most often inscribed on palmised, rectangular clay tablets measuring several centimetres across, although occasionally, larger tablets or cylinders were used. Clay was an excellent medium for writing. Other surfaces which have been employed – for example, parchment, papyrus and paper – are not long – lasting and are easily destroyed by fire and water. But clay has proved to be resistant to those particular kinds of damage.
The word ‘cuneiform’ actually refers to the marks or signs inscribed in the clay. The original cuneiform signs consisted of a series of lines – triangular, vertical, diagonal and horizontal. Sumerian writers would impress these lines into the wet clay with a stylus – a long, thin, pointed instrument which looked somewhat like a pen. Oddly, the signs were often almost too small to see with the naked eye. Cuneiform signs were used for the writing of at least a dozen languages. This is similar to how the Latin alphabet is used today for writing English, French, Spanish and German for example.
Before the development of cuneiform, tokens were used by the Sumerians to record certain information. For example, they might take small stones and use them as tokens or representations of something else, like a goat. A number of tokens, then, might mean a herd of goat. These tokens might then be placed in a cloth container and provided to a buyer as a receipt for a transaction, perhaps five tokens for five animals. It was not that different from what we do today when we buy some bread and the clerk gives us back a piece of paper with numbers on it to confirm the exchange.
By the 4th century BCE, the Sumerians had adapted this system to a form of writing. They began putting tokens in a container resembling an envelope, and now made of clay instead of cloth. They then stamped the outside to indicate the number and type of tokens inside. A person could then ‘read’ what was stamped on the container and know what was inside.
Gradually, Sumerians developed symbols for words. When first developed, each symbol looked like the concrete thing it represented. For example, an image which resembled the drawing of a sheep meant just that. Then another level of abstraction was introduced when symbols were developed for intangible ideas such as ‘female’ of ‘hot’ or ‘God’. Cuneiform, in other words, evolved from a way used primarily to track and store information into a way to represent the world symbolically. Over the centuries, the marks became ever more abstract, finally evolving into signs that looked nothing like what they referred to, just as the letters ‘h-o-u-s-e’ have no visual connection to the place we live in. At this last stage in the evolution of cuneiform, the signs took the form of triangles, which became common cuneiform signs.
As the marks became more abstract, the system became more efficient because there were fewer marks a ‘reader’ needed to learn. But cuneiform also became more complex because society itself was becoming more complex, so there were more ideas and concepts that needed to be expressed. However, most linguists and historians agree cuneiform developed primarily as a tool for accounting. Of the cuneiform tablets that have been discovered, excavated and translated, about 75 percent contain this type of practical information, rather than artistic or imaginative work.
Cuneiform writing was used for thousands of years, but it eventually ceased to be used in everyday life. In fact, it died out and remained unintelligible for almost 2.000 years. In the late 19th century, a British army officer, Henry Rawlinson, discovered cuneiform inscriptions which had been carved in the surface of rocks in the Behistun mountains in what is present-day Iran. Rawlinson made impressions of the marks on large pieces of paper, as he balanced dangerously on the surrounding rocks.
Rawlinson took his copies home to Britain and studied them for years to determine what each line stood for, and what each group of symbols meant. He found that in the writing on those particular rocks every word was repeated three times in three languages: Old Persian, Elamite and Babylonian. Since the meanings in these languages were already known to linguists, he could thus translate the cuneiform. Eventually, he fully decoded the cuneiform marks and he discovered that they described the life of Darius, a king of the Persian Empire in the 5th century BCE.
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Bovids
A
The family of mammals called bovids belongs to the Artiodactyl class, which also includes giraffes. Bovids are a highly diverse group consisting of 137 species, some of which are man’s most important domestic animals.
B
Bovids are well represented in most parts of Eurasia and Southeast Asian islands, but they are by far the most numerous and diverse in the latter Some species of bovid are solitary, but others live in large groups with complex social structures. Although bovids have adapted to a wide range of habitats, from arctic tundra to deep tropical forest, the majority of species favour open grassland, scrub or desert. This diversity of habitat is also matched by great diversity in size and form: at one extreme is the royal antelope of West Africa, which stands a mere 25 cm at the shoulder; at the other, the massively built bison of North America and Europe, growing to a shoulder height of 2.2m.
C
Despite differences in size and appearance, bovids are united by the possession of certain common features. All species are ruminants, which means that they retain undigested food in their stomachs, and regurgitate it as necessary. Bovids are almost exclusively herbivorous: plant-eating “incisors: front teeth herbivorous”.
D
Typically their teeth are highly modified for browsing and grazing: grass or foliage is cropped with the upper lip and lower incisors** (the upper incisors are usually absent), and then ground down by the cheek teeth. As well as having cloven, or split, hooves, the males of all bovid species and the females of most carry horns. Bovid horns have bony cores covered in a sheath of horny material that is constantly renewed from within; they are unbranched and never shed. They vary in shape and size: the relatively simple horns of a large Indian buffalo may measure around 4 m from tip to tip along the outer curve, while the various gazelles have horns with a variety of elegant curves.
E
Five groups, or sub-families, may be distinguished: Bovinea, Antelope, Caprinae, Cephalophinae and Antilocapridae. The sub-family Bovinae comprises most of the larger bovids, including the African bongo, and nilgae, eland, bison and cattle. Unlike most other bovids they are all non-territorial. The ancestors of the various species of domestic cattle banteng, gaur, yak and water buffalo are generally rare and endangered in the wild, while the auroch (the ancestor of the domestic cattle of Europe) is extinct.
F
The term ‘antelope’ is not a very precise zoological name – it is used to loosely describe a number of bovids that have followed different lines of development. Antelopes are typically long-legged, fast-running species, often with long horns that may be laid along the back when the animal is in full flight. There are two main sub-groups of antelope: Hippotraginae, which includes the oryx and the addax, and Antilopinae, which generally contains slighter and more graceful animals such as gazelle and the springbok. Antelopes are mainly grassland species, but many have adapted to flooded grasslands: pukus, waterbucks and lechwes are all good at swimming, usually feeding in deep water, while the sitatunga has long, splayed hooves that enable it to walk freely on swampy ground.
G
The sub-family Caprinae includes the sheep and the goat, together with various relatives such as the goral and the tahr. Most are woolly or have long hair. Several species, such as wild goats, chamois and ibex, are agile cliff – and mountain-dwellers. Tolerance of extreme conditions is most marked in this group: Barbary and bighorn sheep have adapted to arid deserts, while Rocky Mountain sheep survive high up in mountains and musk oxen in arctic tundra.
H
The duiker of Africa belongs to the Cephalophinae sub-family. It is generally small and solitary, often living in thick forest. Although mainly feeding on grass and leaves, some duikers – unlike most other bovids – are believed to eat insects and feed on dead animal carcasses, and even to kill small animals.
I
The pronghorn is the sole survivor of a New World sub-family of herbivorous ruminants, the Antilocapridae in North America. It is similar in appearance and habits to the Old World antelope. Although greatly reduced in numbers since the arrival of Europeans, and the subsequent enclosure of grasslands, the pronghorn is still found in considerable numbers throughout North America, from Washington State to Mexico. When alarmed by the approach of wolves or other predators, hairs on the pronhorn’s rump stand erect, so showing and emphasizing the white patch there. At this signal, the whole herd gallops off at speed of over 60 km per hour.
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Global Warming in New Zealand
A
New Zealand is expected to warm by about 3°C over the next century. The northern polar regions will be more than 6°C warmer, while the large continents – also the largest centres of population – will be 4°C or warmer. In contrast, the Southern Ocean, which surrounds New Zealand, may warm by only 2°C. The sea will act as an air conditioner and in this aspect, New Zealand’s location is comparatively fortunate.
B
Any predictions are complicated by the variability of New Zealand’s climate. The annual temperature can fluctuate as much as 1°C above or below the long-term average. The early summer of 2006–7, for instance, was notably cool, thanks in part to the iceberg that drifted up the east coast. A few months later, warm water from the Tasman Sea helped make May 2007 unusually hot. These variables will continue unaffected so that, although the general pattern will be for rising temperatures, the warming trend may not be uniform.
C
The Ocean to the south of New Zealand will have one important effect. As the world warms, the great bank of west winds that circle Antarctica will become stronger. This has already been observed, and its impact on New Zealand is likely to be profound. Stronger, more frequent west winds will bring increased, sometimes catastrophic rainfall to the west coast of the country and create drier conditions in some eastern regions that are already drought-prone. At the same time, the general warming will spread south.
D
Furthermore, in the drier regions, the average moisture deficit – that is, the difference between the amount of water in soils available to plants and the amount plants need for optimum growth – will increase. Soils could go into moisture deficit earlier in the growing season and the deficits could last longer into autumn than at present. What we think of today as a medium-severity drought could be an almost annual occurrence by the end of the century. One direct consequence of warmer – and shorter – winters will be a reduction in snow cover. The permanent snow line in the mountains will rise, while snow cover below this will be shorter-lived. The amount of snow that falls may actually increase; however, even in some northern centres, owing to the intensification of precipitation, ski-field base stations may eventually have to be moved upwards to be within reach of the new snow line but there could still be plenty of the white stuff up there.
E
There will also be a marked impact on New Zealand’s glaciers. Over the last 100 years, the glaciers have been reduced by 35%, although since 1978 increased snowfall has offset the effect of warming. The latest studies conducted by the National Institute for Water and Atmospheric Research (NIWA), however, suggest that by the end of the century, warming over the Southern Alps could be significantly greater than over the rest of the country.
F
Sea levels around New Zealand have risen by 25 cm since the middle of the 9th century and by 7 cm since 1990. Predictions for the coming years cover a wide range, however, partly because of unknown rises resulting from the melting of the ice in the Arctic, Greenland and Antarctica. In addition, sea level at any given time is affected by many different factors, one of which is called storm surge. When a coincides with a high tide along low-lying coastal areas, this bulge raises the tide higher than normal, creating a surge not unlike a slow-motion tsunami. Not only does an increase in sea level increase the potential for this sort of damage, but it also has immediate impacts inland. The one potentially grave outcome is that groundwater systems may become contaminated with saltwater, spoiling them for the irrigation of farmland, which in turn could diminish crop harvests. Similarly, over time, estuaries may be enlarged by erosion as tidal influences reach further upstream, altering the contours of whole shorelines and initiating further unforeseen consequences.
G
The impacts these changes will have on New Zealand are difficult to generalize. Human systems are better able to adapt to change than natural ecosystems because humans can see a problem coming and plan a response. Farmers and horticulturalists have made considerable advances, replacing crops they grow to better suit the new conditions. However, plant breeders will need to show considerable ingenuity if they can overcome the acute water shortages that are forecast.
H
For natural ecosystems the rate of change is crucial. If it is low, the plants and animals and fish will be able to ‘keep up’; if it is high, only the most adaptable species – those that can survive in the widest range of ecological niches – are likely to survive. Species adapted to only a narrow range of conditions or food sources will find adaptation much more difficult. Take tuatara, for instance. Their sex is determined by the temperature at which the eggs are incubated in warm (currently above 22°C) conditions, predominantly male – and now males already outnumber females by nearly two to one in some island refuges. In the mountains, as the permanent snow line moves upwards, the tolerance zones of some alpine plants and animals may simply disappear. It should also be remembered that global warming is just that – a global phenomenon. ‘New Zealand’s own greenhouse emissions are tiny – around 0.5% of the global total. Even if New Zealanders were to achieve the government’s target of carbon neutrality, this would have no discernable impact on global climate change.
I
The changes that global warming is going to bring to New Zealand during the 21st century are going to be significant, but where the country is likely to be most vulnerable is with respect to climate change elsewhere. New Zealand may warm more slowly than most places, but if its major export markets undergo damaging change, the economic impact will be severe.
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