The hunt for aliens is on! After a distinguished career in cosmology Professor Martin Rees, the astronomer royal, has taken up the search for extra-terrestrials. Looking for aliens is no longer science fiction - it is a question that's engaging some of the greatest minds in science. As our knowledge of the universe has increased, we're getting closer to answers. Many scientists...
又见德雷克公式。大概智慧生命存在的时间相对于浩瀚宇宙确实只是白驹过隙,所以会在时空长河中擦肩错过。
就是个一般的猜想
正是因为不知道存不存在,我们才去探索,行动的初衷甚至是因为有趣,好奇必然伴随风险,然而谁能否认不好奇也伴随风险呢?
为PC加一颗星,整体内容非常入门,讲的都是熟知的公式和猜想。
银河系有十亿颗类地行星,可能有几千万到几百亿智慧文明...科技发展可能导向自我毁灭...智慧文明发展的下一阶段是否是机器人文明...太浩瀚了。地球是如此巨大,地球又是如此渺小。
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