An early computer rendering of a 4-dimensional hypercube, as is explained in this video. This animation was done at Bell Labs in the 1960s and is intended to be viewed with one's eyes crossed.... continue reading

posted by Spiff 1 decade 6 years 7 months 1 week ago • 1,720 views • 1:42

In the 3rd century BCE, Eratosthenes calculated the circumference of the Earth to high precision.

posted by BicycleRepairMan 1 decade 7 years 2 months ago • 6,699 views

Interesting little snippet from "Cosmos"

posted by Fedquip 1 decade 7 years 6 months ago • 2,376 views

The Pale Blue Dot: The picture of Earth from 4 billion miles away. As told by Carl Sagan with some great movie scenes.

posted by eric3579 1 decade 7 years 5 months 1 week ago • 4,473 views • 5:59

One of the best descriptions I've ever seen about what the fourth dimension would look like to a three-dimensional being. (I remember being wowed by this when it first aired.)

posted by atara 1 decade 7 years 2 months ago • 7,677 views

Touching story by Ann Druyan at Beyond Belief '06 describing how her father came out as an atheist to his devout Jewish father. For those who don't know Ann Druyan is the last wife of Carl Sagan. Also... continue reading

Want to learn about the beginning of the universe and life on Earth as we know it, but your Religion doesn't allow for scientific theories or facts? Well, here is Carl Sagan's Cosmos, edited for Creationists.... continue reading

posted by arrendek 1 decade 7 years 8 months 1 week ago • 5,467 views • 29 secs

Carl Sagan Pale blue dot. A parting gift from Voyager Inspired by the words of Carl Sagan in 1991, as he presented to the world, the most distant image yet taken of ourselves.( from 4 billion miles ) ... continue reading

Future generations will look back on our epoch as the time when the human race finally broke into a radically new frontier--space. In Pale Blue Dot Sagan traces the spellbinding history of our launch into... continue reading

posted by mlx 1 decade 7 years 7 months 2 weeks ago • 4,471 views

A moment to remember two great examples of the human species. We walk among long shadows. Johannes Kepler. 1571 - 1630 Carl Sagan. 1934 - 1996

posted by Farhad2000 1 decade 6 years 7 months 3 weeks ago • 1,014 views

Carl Sagan discusses the structure of the human brain and its immense complexity and potential.

posted by jonny 1 decade 7 years 4 weeks ago • 2,915 views

YT summary: We're all in this together - Carl Sagan makes this point better than anyone else, in this clip from his series 'Cosmos, A Personal Voyage'

posted by Fletch 1 decade 7 years 6 months 2 weeks ago • 3,040 views

So nice to hear Dr. Sagan's voice. From YT: Galileo Galilei (15 February 1564 -- 8 January 1642) was an Italian physicist, mathematician, astronomer, and philosopher who is closely associated with the... continue reading

posted by schmawy 1 decade 6 years 9 months 1 week ago • 3,095 views