While it is becoming increasingly common (and easy) for lectures to be placed online as videos or podcasts, such media can often be very limited in their utility. For example, I missed a lecture last ...

A guest lecture by Dorian S. Abbot, an associate professor of geophysics at the University of Chicago, was cancelled by the Massachusetts Institute of Technology (MIT) on September 30 after a group of ...

Imagine you are taking a biology course. You're studying for an exam and would like to revisit the professor's explanation of RNA interference. Fortunately, a digital recording of the lecture is ...