Stephen Hawking on "The Great Silence" (A Galaxy Classic)
In his famous lecture on Life in the Universe, Stephen Hawking asks: “What are the chances that we will encounter some alien form of life, as we explore the galaxy?” If the argument about the time scale for the appearance of life on Earth is correct, Hawking says “there ought to be many other stars, whose planets have life on them. Some of these stellar systems could have formed 5 billion years before the Earth.
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Stephen Hawking on "The Great Silence" (A Galaxy Classic)
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