
Stephen Hawking is a British theoretical physicist who has dedicated much of his life to probing the laws of time and space described by Einstein’s Theory of Relativity.
Carl Sagan was an American astronomer who played a major role in the development of the American space program, as well as his contributions to planetary science.
Arthur C. Clarke is a British author, most famous for the science fiction classic, 2001: A Space Odyssey, and his optimistic vision for mankind exploring the galaxy.
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