The 1993 Bunyan Lecture: Carl Sagan - “Is There Intelligent Life on Earth?”
1:36:01
Carl Sagan's 1994 "Lost" Lecture: The Age of Exploration
28:33
Terence Tao on how we measure the cosmos | The Distance Ladder Part 1
1:22:08
The Nature of Reality: A Dialogue Between a Buddhist Scholar and a Theoretical Physicist
16:46
30 years ago today: Kissinger on Russia & NATO expansion Dec. 5, 1994 PBS Newshour, w/ Jack Matlock
1:00:08
Planets beyond our sun - Carl Sagan's 1977 Christmas Lectures 6/6
48:06
Carl Sagan Archival Lecture Audio - 1977 Origin Stories Podcast
1:26:32
Dr. Carl Sagan Speaks at IMSA
59:52