tailieunhanh - IELTS Academic Reading Sample 49 - Is There Anybody Out There

Thông qua việc giải trực tiếp trên IELTS Academic Reading Sample 49 - Is There Anybody Out There các bạn sẽ nắm vững cấu trúc đề thi, rèn luyện kỹ năng giải đề, hãy tham khảo và ôn thi thật tốt nhé. Chúc các bạn ôn tập để đạt kết quả cao! | IS THERE ANYBODY OUT THERE The Search for Extra-Terrestrial Intelligence The question of whether we are alone in the Universe has haunted humanity forcenturies but we may now stand poised on the brink of the answer to that question as we search for radio signals from other intelligent civilizations. This search often known by the acronym SETI search for extraterrestrial intelligence is a difficult one. Although groups around the world have been searching intermittently for three decades it is only now that we have reached the level of technology where we can make a determined attempt to search all nearby stars for any sign of life. A D The primary reason for the search is basic curiosity - the An alien civilization could choose many same curiosity about the natural world that drives all pure different ways of sending information across science. We want to know whether we are alone in the the galaxy but many of these either require Universe. We want to know whether life evolves naturally if too much energy. or else are severely given the right conditions or whether there is something very attenuated while traversing the vast special about the Earth to have fostered the variety of life distances across the galaxy. lt bums out that. forms that we see around us on the planet. The simple for a given amount of transmitted power detection of a radio signal will be sufficient to answer this radio waves in the frequency range 1000 to most basic of all questions. In this sense SETI is another cog 3000 MHz travel the greatest distance. and in the machinery of pure science which is continually pushing so all searches to date have concentrated on out the horizon of our knowledge. However there are other looking for radio waves in this frequency reasons for being interested in whether life exists elsewhere. range. So far there have been a number of For example we have had civilization on Earth for perhaps searches by various groups around the only a few thousand years and the .