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" "if we have several hundred or several thousand cultures, each with its own cosmology, we should not be astounded if, every now and then, purely by chance, one of them proposes an idea that is not only correct but also impossible for them to have deduced.
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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El mundo es totalmente diferente si la máxima velocidad de un mensaje es la que pueden alcanzar un caballo o una carabea, o bien la de la luz. La velocidad de la luz significa que podemos hablar - prácticamente a tiempo real- con cualquier persona de la Tierra o incluso de la Luna. Pensemos en la medicina. Hace unos siglos, la mayoría de los niños nacidos en las grandes familias de Europa morían en la infancia, a pesar de contar con la mejor asistencia médica de su época. Hoy en día, incluso los pobres de algunas naciones tienen una mortalidad infantil asombrosamente inferior a la de las cabezas coronadas del siglo XVII. O pensemos en la disponibilidad de medios seguros y baratos de control de la natalidad, que implica una revolución en las relaciones humanas y, sobre todo, en la condición de las mujeres.
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He argued that we are so helpless at birth that, if the first human infants had been put into the world on their own, they would immediately have died. From this Anaximander concluded that human beings arose from other animals with more self-reliant newborns: He proposed the spontaneous origin of life in mud, the first animals being fish covered with spines. Some descendants of these fishes eventually abandoned the water and moved to dry land, where they evolved into other animals by the transmutation of one form into another.