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Average life expectancy was apparently just thirty to forty years, but this was due largely to the high incidence of child mortality. Children who made it through the perilous first years had a good chance of reaching the age of sixty, and some even made it to their eighties.
Sapiens
Yuval Noah Harari
She rushed to another terminal and checked the computer’s rating of the signal’s recognizability: AAAAA. Before this, no radio signal received by Red Coast ever garnered a recognizability rating above C. An A rating meant the likelihood that the transmission contained intelligent information was greater than 90 percent. A rating of AAAAA was a special, extreme case: It meant the received transmission used the exact same coding language as Red Coast’s own outbound transmission. Ye turned on the Red Coast deciphering system. The software attempted to decipher any signal whose recognizability rating was above B. During the entire time that the Red Coast Project had been running, it had never been invoked even once in real use. Based on test data, deciphering a transmission suspected of being a message might require a few days or even a few months of computing time, and the result would be failure more than half the time. But this time, as soon as the file containing the original transmission was submitted, the display showed that the deciphering was complete. Ye opened the resulting document, and, for the first time, a human read a message from another world. The content was not what anyone had imagined. It was a warning repeated three times. Do not answer! Do not answer!! Do not answer!!! Still caught up by the dizzying excitement and confusion, Ye deciphered a second message. This world has received your message. I am a pacifist in this world. It is the luck of your civilization that I am the first to receive your message. I am warning you: Do not answer! Do not answer!! Do not answer!!! There are tens of millions of stars in your direction. As long as you do not answer, this world will not be able to ascertain the source of your transmission. But if you do answer, the source will be located right away. Your planet will be invaded. Your world will be conquered! Do not answer! Do not answer!! Do not answer!!!
The Three-Body Problem
Cixin Liu and Ken Liu
“In the end, winning is sleeping better.” —Jodie Foster
Tools of Titans
Timothy Ferriss
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