Neil deGrasse Tyson says America has lost its exploratory compass at Rice's 100th commencement
29:57
Neil deGrasse Tyson: When do we have to leave this planet? - Couple Thinkers - EP 2
42:58
Jordan B. Peterson | 2022 Commencement Address
1:00:46
Neil DeGrasse Tyson - Keynote Speech - 28th National Space Symposium
18:33
Neil deGrasse Tyson on "Interstellar"
22:10
Steve Jobs' 2005 Stanford Commencement Address (with intro by President John Hennessy)
1:28:01
Cosmic Quandaries with Dr. Neil deGrasse Tyson
20:59
J.K. Rowling Speaks at Harvard Commencement
1:00:49