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A global teacher of 1,516 lessons and counting

From a tiny closet in Mountain View, Calif., Sal Khan is educating the globe for free. His 1,516 videotaped mini-lectures -- on topics ranging from simple addition to vector calculus and Napoleonic campaigns -- are transforming ...

Jun 27, 2010 4.8 / 5 (35) 7

The 2009 Ig Nobel prizewinners

(PhysOrg.com) -- The Ig Nobels are a highlight of the scientific calendar and award research that makes people laugh as well as think. The awards were presented last week at Harvard University in the U.S, ...

Oct 05, 2009 5 / 5 (14) 0 weblog