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" "If we ruin the earth, there is no place else to go
Carl Edward Sagan (9 November 1934 – 20 December 1996) was an American astronomer, planetary scientist, cosmologist, astrophysicist, astrobiologist, author, and science communicator. His best known scientific contribution is research on extraterrestrial life, including experimental demonstration of the production of amino acids from basic chemicals by radiation. Sagan assembled the first physical messages sent into space, the Pioneer plaque and the Voyager Golden Record, universal messages that could potentially be understood by any extraterrestrial intelligence that might find them. Sagan argued the hypothesis, accepted since, that the high surface temperatures of Venus can be attributed to, and calculated using, the greenhouse effect. He testified to the US Congress in 1985 that the greenhouse effect will change the earth's climate system.
Biography information from Wikiquote
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Nos cursos de laboratório na escola secundária, havia uma resposta que devíamos obter. Ficávamos marcados se não a conseguíamos. Não havia nenhum encorajamento para seguir nossos interesses, intuições ou erros conceituais. Nas páginas finais dos livros didáticos, havia material visivelmente interessante. O ano escolar acabava sempre antes de chegarmos até aquele ponto.
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