Who Knows
Since no one knows what scientific discoveries will be made between now and the year A. D. 2000, each of us can make his own predictions.
Our prophecies need not be completely wild guesses. We know science has moved forward rapidly in the past 50 years and will continue to do so. If we allow our imaginations to be guided by known research, our prophecies need not be sheer fantasy. We dont have to go so far as to predict that there will be invasion by men from Mars, or that all food and nourishment will be taken in capsule form, or that mechanical men will roam the world.
With the scientific information that we have available now, lets make an estimate of progress in air travel. It is likely that within 50 years we shall travel through the air at a speed of 10,000 miles per hour. Too fast? Not at all. Jet-propelled planes can now travel at least 1,000 miles an hour, and jet planes will be outmoded shortly by guided missiles. The X-15 rockets speed in 1961 was 3,690 miles per hour, and scientists are hoping to double and even triple this speed. They will accomplish this speed-up, because there is no apparent scientific obstacle to prevent it.
Some day, certain aerodynamic problems will be overcome and missiles will be enlarged to carry at least 25 passengers. When scientists have solved all the problems of constructing and increasing the speed of apparatus-carrying missiles, their skill will lead them to the next step missiles for interplanetary flight. This prediction is a scientific possibility in the near future.
Flights into outer space began when Sputnik I was launched in 1957, and man first went into space in 1961. During the late 1950s and early 1960s many satellites man-made astral bodies orbited the earth and moon. Satellites, which will be controlled by men on earth, may have many beneficial uses. Perhaps scientists will discover a source of energy 100 miles above the earth. This energy could be transmitted to us as a source of power for manufacturing plants or even for our cook stoves. Or one of these missiles might serve as the medium for transmitting communications across the globe. Telephoniccommunications might be carried on by beaming waves at the missile, which would in turn beam waves at a telephone halfway across the world. The missile might be the telephonic connection, for example, between you in New York, and a friend in Bangkok.
Such a satellite might also be used as the transmitting medium for interna tional television broadcasts. Programs being telecast from a Paris studio could then be seen simultaneously in every other country. This immediate international transmission will surely be a development before the turn of a new century.
上一篇: 四级冲刺练习阅读(114)
下一篇: 四级冲刺练习阅读(104)
体坛英语资讯: Raptors coach Casey believes he could stay after heartbreaking loss to Cavs
国内英语资讯: Chinas top legislator meets AU Commission deputy chair, eyeing closer China-Africa coopera
川普总统星期二将宣布是否退出伊朗核协议
揭秘:我们的眼皮为什么会跳?
国内英语资讯:Chinese premier stresses brand building
浙江省东阳中学2017-2018学年高二下学期期中考试英语试卷
最棒的六人组!初代复联成员齐晒纪念纹身
觉得骑车或步行上班太花时间?你可能想错了
内衣多久洗一次才最合适?
美文赏析:难道真要工作一辈子吗?
2018年6月英语六级作文范文:如何培养阅读习惯
2018年06月英语六级作文范文: 科学与世界难题
Wave, current and tide 三个表示“浪潮”的词语
国内英语资讯: Irans FM leaves Tehran for Beijing for talks on nuclear deal
即使是少量运动,也能带来幸福感
盘点:世界上最聪明的动物们
浙江省东阳中学2017-2018学年高一下学期期中考试英语试卷
体坛英语资讯: Marseille lose upper hand in Champions League ticket contention
体坛英语资讯:Barca win again while Madrid suffer another defeat in Liga Santander
小测验 — 与 “mother” 相关的常用英语表达
体坛英语资讯: Neymar reveals World Cup injury fear
2018年6月英语六级作文范文:你喜欢以下哪种交通工具
体坛英语资讯: Ding Junhui inducted into world snooker Hall of Fame in London
体坛英语资讯:Paraguays Dominguez re-elected as CONMEBOL president
外语想学地道? 那最好在10岁前开始学!
汶川地震10周年:她们重获新生
体坛英语资讯:Boca Juniors win Superliga Argentina title
什么样的男人桃花运旺?
漫威推出首批中国超级英雄,了解一下?
2018年06月英语六级作文范文:你喜欢健康还是财富