PVN Archived Stream - 60-Second Lectures

Now Scientific American does it, but go to PVN Archived Stream - 60-Second Lectures for lectures like:

Vijay Balasubramanian, Merriam Term Assistant Professor of Physics
"The Knowable Universe"
(0:01:44)

(an expanding universe perhaps since sixty seconds now takes 104 seconds...)

or


Charles Bernstein, professor of English, answers the question: "What Makes a Poem a Poem?"
(0:01:23)