Lesson14-Space Shuttle Challenger . Text Analysis Further Discussion History has told us that in our search for outer space or deep sea or the secrets of other scientific fields, disasters are not common. We have always had to pay dearly for our discoveries often with our lives. Is such sacrifice worth hile? Why do people keep doing these things knowing how risky they are? What do you think are the motives of these explorers? W B TL E The end of further discussionLesson14—Space Shuttle Challenger W B T L E History has told us that in our search for outer space or deep sea or the secrets of other scientific fields, disasters are not common. We have always had to pay dearly for our discoveries, often with our lives. Is such sacrifice worthwhile? Why do people keep doing these things knowing how risky they are? What do you think are the motives of these explorers? I. Text Analysis Further Discussion The end of Further Discussion