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Offline learning is the latest tool for the unorthodox education organization. Here's how that and other new features will power Khan Academy's new app. Khan Academy , the wildly popular YouTube lecture series, is slated to launch its iPad app any minute now in Apple's store

In 1964, physicist Richard Feynman delivered a series of lectures titled “On the Nature of Physical Law.” Feynman delivered these seven one-hour lectures at Cornell in 1964, and the BBC taped them.