Carl Sagan discuses Johannes Kepler's Somnium (The Dream), written between 1620 and 1630, it's sinabi to have been called the first piece of science fiction.

Inspired sa pamamagitan ng Carl Sagan. My tribute. The effects of human ignorance, greed & superstition: pollution, global warming & over-population .

A pagbaba of Carl Sagan's Pale Blue Dot sa pamamagitan ng bituin Trek's Robert Picardo, who also serves as a member of The Planetary Society Board of Directors and is the host of our monthly email newsletter, The Planetary Post.

Scientist Carl Sagan is concerned about America’s future when citizens lack the scientific and technological understanding to make informed decisions.