首页
登录
职称英语
What are the chances that we will encounter some alien form of life, as we ex
What are the chances that we will encounter some alien form of life, as we ex
游客
2025-04-25
39
管理
问题
What are the chances that we will encounter some alien form of life, as we explore the galaxy. If the argument about the time scale for the appearance of life on Earth is correct, there ought to be many other stars, whose planets have life on them. Some of these stellar systems could have formed 5 billion years before the Earth. So why is the galaxy not crawling with self designing mechanical or biological life forms? Why hasn’t the Earth been visited, and even colonized. I discount suggestions that UFOs contain beings from outer space. I think any visits by aliens would be much more obvious, and probably also, much more unpleasant.
What is the explanation of why we have not been visited?
One possibility is that the argument about the appearance of life on Earth is wrong. Maybe the probability of life spontaneously appearing is so low that Earth is the only planet in the galaxy, or in the observable universe, in which it happened.
Another possibility is that there was a reasonable probability of forming self-reproducing system, like cells, but most of these forms of life did not evolve intelligence.
A third possibility is that there is a reasonable probability for life to form, and to evolve to intelligent beings, in the external transmission phase. But at that point, the system becomes unstable, and the intelligent life destroys itself. This would be a very pessimistic conclusion. I very much hope it isn’t true.
I prefer a fourth possibility: there are other forms of intelligent life out there, but we have been overlooked. There used to be a project called SETI, the search for extraterrestrial intelligence. It involved scanning the radio frequencies, to see if we could pick up signals from alien civilizations. I thought this project was worth supporting, though it was cancelled due to a lack of funds. But we should have been wary of answering back, until we have developed a bit further. Meeting a more advanced civilization, at our present stage, might be a bit like the original inhabitants of America meeting Columbus. I don’t think they were better off for it. [br] In the author’s eyes, the search for extra-terrestrial intelligence ______.
选项
A、is unnecessary
B、should be supported
C、is a waste of money
D、has not been done appropriately
答案
B
解析
参看文章最后一段中的一句话:I thought this project was worth supporting,though it was cancelled due to a lack of funds.
转载请注明原文地址:http://tihaiku.com/zcyy/4053186.html
相关试题推荐
Thechancesofarepetitionofthoseunfortunateeventsare_______indeed.A、dist
Whatarethechancesthatwewillencountersomealienformoflife,asweex
Whatarethechancesthatwewillencountersomealienformoflife,asweex
Whatarethechancesthatwewillencountersomealienformoflife,asweex
Oneofthemostdifficultsituationsthataresearchercanencounteristos
Oneofthemostdifficultsituationsthataresearchercanencounteristos
Oneofthemostdifficultsituationsthataresearchercanencounteristos
Thechancesofarepetitionofthoseunfortunateeventsare______indeed.A、dista
Ifyouareafanofsciencefiction,you’venodoubtencounteredthetermna
Ifyouareafanofsciencefiction,you’venodoubtencounteredthetermna
随机试题
Heplayssquashtothe______ofallothersports.A、eradicationB、exclusionC、ex
Manywhothinktheyhavefoodallergies(过敏)actuallydonot.Anewreport,co
Theachievementsofthegreatestmindsinsciencecouldneverhavebeenreached
下列关于幼儿的肠道功能说法错误的是()。A.吸收能力强 B.消化能力差 C
股权投资基金托管人是基金重要的当事人之一,作为基金托管人的基础服务和首要职责是(
萜类化合物由什么衍生而成A.甲戊二羟酸B.异戊二烯C.桂皮酸D.苯丙氨酸E.酪氨
D第一步,本题考查非整数数列中的分数数列。 第二步,由于反约分后无明显规律,分数做差,考虑做差。两两做差得到新数列:、(),分子不变,分母为公差为3的等差
现代教育与传统教育的根本区别在于()。 A.思维能力的培养B.创新能力的培
1
(2020年真题)关于建设工程合理使用年限的说法,正确的是( )。A.建设工程
最新回复
(
0
)