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“Soviet astrophysicist Nicolai Kardashev once proposed that civilizations can be divided into three types based on the power they can command—for communication purposes, let’s say. A Type I civilization can muster an amount of energy equivalent to the total energy output of the Earth. Based on his estimates, the energy output of the Earth is about 1015 to 1016 watts. A Type II civilization can marshal the energy equivalent to the output of a typical star—1026 watts. A Type III civilization’s communication energy can reach 1036 watts, approximately equal to the energy output of a galaxy. Civilization on Earth is currently about a Type 0.7, not even a full Type I. And the transmissions from Red Coast used only about one ten-millionth of the amount of power the Earth could muster. Our call was like the buzzing of a mosquito in the sky. No one could hear it.” “But if Kardashev’s Type II and Type III civilizations really exist, we should be able to hear them.” “We never heard anything during the twenty years that Red Coast was in operation.” “Indeed. Given Red Coast and SETI, could all our efforts ultimately have proven only one thing: In the entire universe, only the Earth has intelligent life?” Ye gave a light sigh. “Theoretically, there may never be a definitive answer to that question. But my sense, and the sense of everyone who went through Red Coast, is that that is the case.”
The Three-Body Problem
Cixin Liu and Ken Liu
Down on the formation, the ant wanted to turn toward the sky, but then discovered another trough ahead of it, identical to the “9”-shaped trough it had crawled through before the “7.” So it continued horizontally through the “9,” which it found better than both the “7” and the “1.” although it could not say exactly why. Its aesthetic sense was primitive and single-celled. The indistinct pleasure it had felt upon crawling through the “9” intensified. A primitive, single-celled state of happiness. These two spiritual monocells, aesthetics and pleasure had never evolved. They had been the same a billion years ago, and would be the same a billion years hence.
The Dark Forest
Cixin Liu
Compassion
82. Call your parents when you think of them, tell your friends when you love them.
83. Compliment people more. Many people have trouble thinking of themselves as smart, or pretty, or kind, unless told by someone else. You can help them out.
100 Tips for a Better Life
ideopunk.com
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