Bioastronomy is meant to deal with life in space but here these scientists are discussing matters concerning this earthly world.Hence the"down-to Earth side' of bioastronomy.This idea is expressed in a humorous way. Paras.46-52 1.The main idea of this section:This section contains the key message of the article.The message has two parts:one is"our first order of business,as a species,is to make our civilization last as long as possible".the other is "what we want is to find a better version of ourselves"From this we can see the author's attitude towards alien life and the enthusiasm in looking for extraterrestrial life.He thinks that it would be much better to address problems in the world,to get rid of human defects and to make the world a better place to live in. 2.So before we worry.closer to home. Since there is so much work (scientific study)we need to do here in this world (since there are so many issues we need to address in this world).let us first concentrate on doingme soid research(on addressing these issues)and drop discussions about drafting messages to another civilization out there.We'd better do some solid. practical work in this world rather than wasting time on empty talk about answering message from alien civilization. 3.What is the argument of Freeman Dysen? His argument is humans may engineer new forms of life and send them to live in the universe.He calls such projects the work of a midwife. 4.Humans in their modern anatomy.or so. Humans came to have their modern shape and structure only some 125,000 years ago.It was only a recent thing that humans had evolved into their modern shape and structure.The time is estimated as at 125,000 years before now. 5.Why does the author say it may not be a long-term advantage for us to have brains? Does he really mean it? He is being sarcastic here.He means that humans have brains but with brains,there come wars,pollution,man-made disasters.In that case,the world may be better off if humans have not had brains of our kind.This is a bitter attack on human vices. 6.What does the author want to convey in the last sentence? He wants to stress that the important thing for us is to concentrate on improving the human race,to rid it of those vices which are destroying this world. 7.Concluding remark This is not a piece dealing purely with extraterrestrial life.The author's purpose is toBioastronomy is meant to deal with life in space but here these scientists are discussing matters concerning this earthly worl d.Hence,the “down-to Earth side” of bioastronomy.This idea is expressed in a humorous way. Paras. 46—52 1. The main idea of this section: This section contains the key message of the article.The message has two parts:one is “our first order of business,as a species,is to make our civilization last as long as possible”;the other is “what we want is to find a better version of ourselves”.From this we can see the author’s attitude towards alien life and the enthusiasm in looking for extraterrestrial life.He thinks that it would be much better to address problems in the world,to get rid of human defects and to make the world a better place to live in. 2. So before we worry . closer to home. Since there is so much work (scientific study) we need to do here in this world (since there are so many issues we need to address in this world),let us first concentrate on doing some solid research (on addressing these issues) and drop discussions about drafting messages to another civilization out there.We’d better do some solid, practical work in this world rather than wasting time on empty talk about answering message from alien civilization. 3. What is the argument of Freeman Dysen? His argument is humans may engineer new forms of life and send them to live in the universe.He calls such projects the work of a midwife. 4. Humans in their modern anatomy . or so. Humans came to have their modern shape and structure only some 125,000 years ago.It was only a recent thing that humans had evolved into their modern shape and structure.The time is estimated as at 125,000 years before now. 5. Why does the author say it may not be a long-term advantage for us to have brains? Does he really mean it? He is being sarcastic here.He means that humans have brains but with brains,there come wars,pollution,man-made disasters.In that case,the world may be better off if humans have not had brains of our kind.This is a bitter attack on human vices. 6. What does the author want to convey in the last sentence? He wants to stress that the important thing for us is t o concentrate on improving the human race,to rid it of those vices which are destroying this world. 7. Concluding remark: This is not a piece dealing purely with extraterrestrial life.The author’s purpose is to