Carl Sagan's Pale Blue Dot OFFICIAL
1:36:01
Carl Sagan's 1994 "Lost" Lecture: The Age of Exploration
3:31
Carl Sagan - Pale Blue Dot
2:07:07
The 1993 Bunyan Lecture: Carl Sagan - “Is There Intelligent Life on Earth?”
16:54
Carl Sagan testifying before Congress in 1985 on climate change
6:55
Neil deGrasse Tyson Puts Earth's Smallness Into Perspective
28:28
Russell's Paradox - a simple explanation of a profound problem
48:06
Carl Sagan Archival Lecture Audio - 1977 Origin Stories Podcast
1:35