Richard Feynman was something of a rockstar in the physics world, and his lectures at Caltech in the early 1960s were legendary.
As Robbie Gonzalez reports for io9, footage of these lectures exists, but they were most famously preserved in a three-volume collection of books called The Feynman Lectures - which has arguably become the most popular collection of physics books ever written.
And now you can access the entire collection online for free.
The Feynman Lectures on Physics have been made available as part of a collaboration between Caltech and The Feynman Lectures Website, and io9 reports they have been designed to be viewed, equations and all, on any device.
The lectures were targeted at first-year university physics students, but they were attended by many graduates and researchers, and even those with a lot of prior physics understanding will be able to get something out of them.
And even if you're a physics novice (like me), you can still marvel at the fantastic teaching and amazing science. Like Feynman said: “Physics is like sex: sure, it may give some practical results, but that's not why we do it.”
Now stop wasting time online and go and learn from one of the greatest minds in physics.

Project Tuva is an enhanced video player platform released by Microsoft Research to host the Messenger Lectures series titled The Character of Physical Law given at Cornell University by Richard Feynman in 1964 and recorded by the BBC.[1] The project was a collaborative effort between Bill Gates and Microsoft Research that is designed to demonstrate the potential of enhanced video to teach people about the "core scientific concepts" of Feynman's lectures using interactive media. According to his video introduction, Gates saw the lectures when he was younger.[2] He enjoyed the physics concepts and Feynman's lecturing style, and later acquired the rights to make the video available to the public. He hopes that this will encourage others to make educational content available for free.

Project Tuva was officially released at the Microsoft Research Faculty Summit, July 13 and 14, 2009.[4] At its inception, Project Tuva included video of the lectures with expert commentary from Stephen D. Ellis of the University of Washington and the Student Physics Society at the University of Washington. The Silverlight application also includes text search over transcripts (which are shown synchronized with the video), support for time-stamped note-taking, and "Extras" that complement the video with external links, formulae, interactive demonstrations, and embedded WorldWide Telescope astronomical objects and tours. Upon release the Extras and commentary were only available for the first of the seven lectures: The Law of Gravitation - An Example of Physical Law, with the others promised later in 2009. In April 2011, Tuva was updated with new content and extras curated by MIT Jane and Otto Morningstar Professor of Physics Robert Jaffe.

The project gets its name from a late-life goal of Feynman's; namely, that he would someday travel to the Russian land of Tuva. Unfortunately, he was never allowed to travel to Tuva during his lifetime, with permission from the Russian government coming the day following his death. The name then invokes the idea that a dream of his is now accomplished - not, of course, traveling to Tuva, but rather that the world may now be able to appreciate physics the way he did.

The original design for Project Tuva was carried out by Artefact.[5] Stimulant provided refinements and developed the experience in Silverlight.

The lectures are made available by Microsoft Research online.