...y porque era el alma mía
l'alma de las mariposas...

• Carl Sagan en CNN
• Dr. Carl Sagan Paul Chui
• Carl Sagan Federation of American Scientists
• Carl Sagan: Prophet of Scientism by David Merton
• Tribute to Car Sagan The Planetary Society
• Nova Online: Kidnapped by UFOS: Interview with Carl Sagan
• Carl Sagan BluePoint
• The Quest for Extraterrestrial Intelligence by Carl Sagan (Cosmic Search Magazine)
• http://www.carlsagan.com/ Cosmos Studios
• Carl Sagan Official Home Page
• The Carl Sagan Electronic Monument
• Carl Sagan, an Astronomer Who Excelled at Popularizing Science, Is Dead at 62 The New York Times
• Carl Sagan. Link on the Web MArie Smith
• A la memoria de Carl Sagan Alberto Carrasco

• What is science Prof. Fred L. Wilson, Rochester Institute of Technology
• The Scientific Method can be used to resolve any problem Science Room
• The Mad Scientist: Learning about the scientific method
• What is the "Scientific Method"? Jose Wudka
• Science in the home
• On Science, Scientific Method and Evolution of Scientific Thought:A Philosophy of Science Perspective of Quasi-Experimentation
• Advances in Quasi-Experimentation
• Introduction to the Scientific Method
• Integrated Scientific Method
• Bad Science

• Commeette for the Scientific Investigation of Claims of the Paranorma, CSICOP
• The James Randi Educational Foundation
• The Skeptic Magazine
• The Enciclopedia of Eskepticism and the Paranormal
• Skeptic.com The Skeptics Society, Altadena, CA
• Practical Skepticism
• Carl Sagan's Baloney Detection Kit

• SciCentral
• Windows to the Universe
• Science News: The Weekly Newsmagazine of Science
• Discover Magazine
• Nova on Line
• Know what
• Ask to Dr. Universe
• The Mad Scientist Network
• How Stuff Works
• Ciencia.net

• Leonardo da Vinci: A man of both worlds
• Stephen Hawking's Universe
• 4000 years of women in science
• The Nobel Prize

• Introduction to Particle Physics

...el Señor que lo veía
a mi paso sembró rosas.
Rafael Arévalo Martínez