So Where Are All Those Aliens

Advanced alien civilizations are now present in our galaxy. That's the message that the author sends out to readers in this interesting little book. The reasons why there has to be life elsewhere in the universe are explained, in fairly non technical words, so that most any reader can understand. After explaining why life has to be out there, the book then goes on to explain why some of that life has to be intelligent, and advanced to levels above and beyond where humans on Earth are now. T...