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" "la certeza absoluta siempre se nos escapará.
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.
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Instead of wanting everyone to share and know of their discoveries the Pythagoreans suppressed the square root of two and the dodecahedron. The outside world was not to know. The Pythagoreans had discovered, in the mathematical underpinnings of nature, one of the two most powerful scientific tools, the other of course is experiment, but instead of using their insight to advance the collective voyage of human discovery they made of it little more than the hocus-pocus of a mystery cult. Science and mathematics were to be removed from the hands of the merchants and the artisans.
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"ولكنه عاد يتذكر أن الاستذكار للامتحان النهائي كان له تأثير معوق عليه بحيث إنه يجد أن "التفكير في أي معضلة علمية شيء كريه لمدة عام كامل، ... وإنه ليكاد يكون من المعجزات أن الطرق الحديثة للتعليم لم تخنق الفضول المقدس للمعرفة والبحث، لأن ذلك النبت الصغير الرقيق يحتاج أكثر ما يحتاج، إضافة إلى التشجيع المبدئي، إلى الحرية، فبدونها سوف يُدمر. ... وإني أؤمن بأن بوسع المرء أن يقضي على نهم حيوان مفترس في صحة جيدة إن هو أجبره بالسياط على أن يأكل بصورة مستمرة سواء كان جائعًا أم لا