Would you choose to live underground if you could gain many advantages from doing so? Weather would no longer trouble you. Temperature would remain the same all the year round. Artificial lighting could make the rhythm of our life uniform everywhere. And the ecology of the natural world above ground would be greatly improved. Still, the prospect of moving underground may not be appealing to many people.
THE NEW CAVES
Isaac Asimov
During the ice ages, human beings exposed to the colder temperatures of the time would often make their homes in caves. There they found greater fort and security than they would have in the open.
We still live in caves called houses, again for fort and security. Virtually no one would willingly sleep on the ground under the stars. Is it possible that someday we may seek to add further to our fort and security by building our houses underground ―― in new, manmade caves?
It may not seem a palatable suggestion, at first though. We have so many evil associations with the underground. In our myths and legends, the underground is the realm of evil spirits and of the dead, and is often the location of an afterlife of torment. （This may be because dead bodies are buried underground, and because volcanic eruptions make the underground appear to be a hellish place of fire and noxious gases.）
Yet there are advantages to underground life, too, and something to be said for imagining whole cities, even mankind generally, moving downward; of having the outermost mile of the Earth’s crust honeybed with passages and structures, like a gigantic ant hill.
First, weather would no longer be important, since, it is primarily a phenomenon of the atmosphere. Rain, snow, sleet, fog would not trouble the underground world. Even temperature variations are limited to the open surface and would not exist underground. Whether day or night, summer or winter, temperatures in the underground world remain equable and nearly constant. The vast amounts of energy now expended in warming our surface surroundings when they are too cold, and cooling them when they are too warm, could be saved. The damage done to manmade structures and to human beings by weather would be gone. Transportation over local distances would be simplified. （Earthquakes would remain a danger, of course.）
Second, local time would no longer be important. On the surface, the tyranny of day and night cannot be avoided, and when it is morning in one place, it is noon in another, evening in still another and midnight in yet another. The rhythm of human life therefore varies from place to place. Underground, where there is no externally produced day, but only perpetual darkness, it would be arificial lighting that produces the day and this could be adjusted to suit man’s convenience.
The whole world could be on eight-hour shifts, starting and ending on the stroke everywhere, at least as far as business and munity endeavors were concerned. This could be important in a freely mobile world. Air transportation over long distances would no longer have entail "jet lag." Individuals landing on another coast or another continent would find the society they reached geared to the same time of day as at home，五姊妹翻譯社11.
Third, the ecological structure could be stabilized. To a certain extent, mankind encumbers the Earth. It is not only his enormous numbers that take up room; more so, it is all the structures he builds to house himself and his machines, to make possible his transportation and munication, to offer him rest and recreation. All these things distort the wild, depriving many species of plants and animals of their natural habitat ―― and sometimes, involuntarily, favoring a few, such as rats and roaches.
If the works of man were removed below ground ―― and, mind you, below the level of the natural world of the burrowing animals ―― man would still occupy the surface with his farms, his forestry, his observation towers, his air terminals and so on, but the extent of that occupation would be enormously decreased. Indeed, as one imagines the underground world to bee increasingly elaborate, one can visualize much of the food supply eventually deriving from hydroponic growth in artificially illuminated areas underground. The Earth’s surface might be increasingly turned over to park and to wilderness, maintained at ecological stability.
Fourth, nature would be closer. It might seem that to withdraw underground is to withdraw from the natural world, but would that be so? Would the withdrawal be more plete than it is now, when so many people work in city buildings that are often windowless and artificially conditioned? Even where there are windows, what is the prospect one views （if one bothers to） but sun, sky, and buildings to the horizon ―― plus some limited greenery?
And to get away from the city now? To reach the real countryside? One must travel horizontally for miles, first across city pavements and then across suburban sprawls.
In an underworld culture, the countryside would be right there, a few hundred yards above the upper level of the cities ―― wherever you are. The surface would have to be protected from too frequent, or too intense, or too careless visiting, but however carefully restricted the upward trips might be, the chances are that the dwellers of the new caves would see more greenery, under ecologically healthier conditions, than dwellers of surface cities to today.
However odd and repulsive underground living may seem at first thought, there are tings to be said for it ―― and I haven’t even said them all.
New Words
virtually
ad. almost
someday
ad. at some uncertain future time 有朝一日
underground
a. below the surface of the earth; secret 天下的；祕稀的
ad. under the earth’s surface; secretly
manmade
a. produced by people; not existing in nature
palatable
a. agreeable to the taster or （fig.） to the mind; acceptable 可心的；受懽迎的
association
n. an idea or object connected with another idea in thought 聯念
legend
n. an old story handed down from the past, esp. one of doubtful truth 傳說；傳偶
spirit
n. 神靈；鬼魅
location
n. a place or position 場所，位寘
afterlife
n. the life after death as is believed by some people 來世
torment
n. sever pain or suffering in mind or body 痛瘔；熬煎
volcanic
a. of, like, produced or caused by a volcano
eruption
n. outbreak of a volcano; （an example of） the action of erupting （水山）爆發
hellish
a. like hell, horrible, devilish
noxious
harmful to people, plants, or animals 有害的，有毒的
mankind
n. the human race 人類
downward
ad. towards a lower level or position
outermost
a. farthest from the inside or center
crust
n. 地殼
honeyb
vt. fill with holes, tunnels, etc. 使成蜂窩狀
gigantic
a. huge, enormous; of or like a giant 宏大的，龐年夜的
ant
n. 螞蟻
fog
n. very thick mist
variation
n. the action of varying; an example or degree of varying 變化
equable
a. steady; not changing much 穩定的
constant
a. unchanging; fixed 永桓的
simplify
vt. make simple; make easy to do or understand
earthquake
n. sudden and violent movements of the earth’s surface 地动
tyranny
n. the cruel or unjust use of power to rule a person or country 專造
vary
v. （cause to） the different 變化
variable
a. likely to vary; not steady 易變的
n. sth. which can vary in quantity or size 變量
externally
ad. outside
external a.
artifical
a. not natural or real; manmade
adjust
vt. set right; change slightly, esp. in order to make suitable for a particular job or new conditions 調整，翻譯公司；調節
convenience
n. personal fort or advantage; the quality of being convenient 方便，便利
convenient a.
stoke
n. sound made by a bell striking the hours 鍾鳴聲
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