at 8:40 you'll see my beloved professor of sci-fi lit, Dr. Carl Silvio :D
And Symphony of Science music videos I can't get enough of...
A Glorious Dawn (Carl Sagan with Stephen Hawking)
We Are All Connected (Carl Sagan, Richard Feynman, Neil deGrasse Tyson, and Bill Nye)
Our Place In the Cosmos (Carl Sagan, Richard Dawkins, Michio Kaku, Robert Jastrow)