Motion, a Historical Survey "Motion," or "movement," in its modern meaning, is change—or more precisely, change of the relative positions of bodies. The concept of motion thus involves the ideas of space and time....

Motion The nature of motion and the philosophical problems surrounding it have been perennial issues in Western philosophy. Motion is a special case of change, and much discussion relevant to motion extends naturally to change in general (see Mortensen...

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Dance Rambert Swan Lake I must have been away the day we did the Theory of Relativity so Constant Speed, Mark Baldwin's new piece for Rambert, offered a possible source of adult education. The work is a hugely imaginative commission from the...

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Some of the latest mobile phones in Japan come with motion sensors that let users detect motion or play action games like those on the Nintendo Wii console.The D904i from NTT DoCoMo, Japan's top mobile carrier, contains a tiny motion sensor that detects shaking and...

Shares of Research in Motion Ltd. fell nearly 3 percent Friday, a day after the BlackBerry maker said its fiscal third-quarter earnings rose 47 percent and it added 875,000 subscribers for the period.The company also predicted fourth-quarter earnings in a range of 92 cents per...