The latest web celeb is a physics professor. Professor Walter Lewin, who teaches an introductory physics course at MIT, has become an internet celebrity thank to his outrageous antics, daredevil ...

For the past four minutes, Walter Lewin has been laboring at the chalkboard, bent on conveying a point—or rather, a series of small, swift points, so close together they resemble a perforation. The 76 ...