Books permit us to voyage through time, to tap the wisdom of our ancestors. The library connects us with the insight and knowledge, painfully extract… - Carl Sagan

Books permit us to voyage through time, to tap the wisdom of our ancestors.

A googolplex is precisely as far from infinity as is the number 1... no matter what number you have in mind, infinity is larger still.

In a set of classic experiments, the psychologist Z. Y. Kuo6 showed that almost all kittens who witness their mother killing and eating a rodent eventually do so themselves. However, when kittens are raised in the same cage with a rat, never seeing any other rat, and never seeing a cat kill a rat, then they almost never kill rats themselves. When kittens have a rat for a littermate and also witness their mothers killing rats outside the cage, about half of them learn to kill — but they tend to kill only the kinds of rat they had seen their mothers kill, and not the kinds that they grew up with. Finally, when kittens are given an electric shock each time they see a rat, they soon learn not to kill rats — indeed, to run in terror from them.

In contemporary Western society, buying a magazine on astrology - at a newsstand, say - is easy; it is much harder to find one on astronomy. Virtually every newspaper in America has a daily column on astrology; there are hardly any that have even a weekly column on astronomy. There are ten times more astrologers in the United States than astronomers. At parties, when I meet people that do not know I’m a scientist, I am sometimes asked “Are you a Gemini?” (chances of success, one in twelve), or “What sign are you?” Much more rarely am I asked “Have you heard that gold is made in supernova explosions?” or “When do you think Congress will approve a Mars Rover?”
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And personal astrology is with us still: consider two different newspaper astrology columns published in the same city on the same day. For example, we can examine The New York Post and the New York Daily News on September 21, 1979. Suppose you are a Libra - that is, born between September 23 and October 22. According to the astrologer for the Post, ‘a compromise will help ease tension’; useful, perhaps, but somewhat vague. According to the Daily News’ astrologer, you must ‘demand more of yourself’, an admonition that is also vague but also different. These ‘predictions’ are not predictions; rather they are pieces of advice - they tell you what to do, not what will happen. Deliberately, they are phrased so generally that they could apply to anyone. And they display major mutual inconsistencies. Why are they published as unapologetically as sport statistics and stock market reports?
Astrology can be tested by the lives of twins. There are many cases in which one twin is killed in childhood, in a riding accident, say, or is struck by lightning, while the other lives to a prosperous old age. Each was born in precisely the same place and within minutes of the other. Exactly the same planets were rising at their births. If astrology were valid, how could two such twins have such profoundly different fates? It a