Speeches
- The 1998 Presidential Awards for Mathematics and Science Teaching
- Keynote Address, State Department, Washington, DC. To honor the 2004 Presidential Awardees for Excellence in Science and Mathematics Teaching. Administered by the National Science Foundation. (Audience: 350)
- Reminisces of Carl Sagan
- Eulogy for Carl Sagan, The Cathedral of St. John the Divine, New York City
February 27, 1997. Delivered as part of a memorial service entitled
A Celebration of Carl Sagan's Life.
Other speakers among the dozen in the program included Carl Sagan's widow Ann Druyan, two of his children, and Vice President Al Gore. (Audience: 600) - Dedication of the Center for Space Education
- Luncheon Keynote Address, Kennedy Space Center, July 15, 1994. (Audience: 350)
- PhD Convocation Address
- Speech Delivered at St. Paul's Chapel, Columbia University, New York City, May 14, 1991. Addressing my graduating class of Doctoral Candidates. (Audience: 400)
