Risultati di "Carl Sagan" in Tutte le categorie

¿Estamos al borde de una nueva edad oscura de irracionalismo y superstición? En este libro conmovedor, el incomparable Carl Sagan demuestra con brillantez que el pensamiento científico es necesario para salvaguardar nuestras instituciones democráticas y nuestra civilización técnica. El...

This recording features the highlights of this historic 1995 event sponsored by the Temple of Understanding and includes a talk by the late cosmologist Carl Sagan. Visions for the 21st Century was a powerful forum for religious leaders, diplomats, nongovernmental organizations, and educators to present their visions for the next century.

Carl Edward Sagan (November 9, 1934-December 20, 1996), born in Brooklyn, NY, was an American astronomer and astrophysicist. His best-known scientific contribution was his research on the possibility of extraterrestrial life, including experimental demonstration of the production of amino acids from basic chemicals by exposure to light. The following is a lecture Sagan gave in 1977 during which he discussed the place, scale and geometry of earth–the third planet from the Sun, formed 4.5 billion years ago–in our solar system.