Instead of using a microphone to pick up sound, his system uses gyroscopes to measure movement in three dimensions.

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Chemistry.com, for instance, promises to match people based on their neurochemical profiles, while eHarmony.com attempts to measure applicants on 29 dimensions of personality.

WSJ: Jonah Lehrer on Eharmony.com, Chemistry.com and Other Dating Services | Head Case

There are three bony loops in your inner ear, called semicircular canals, arranged perpendicular to each other to measure movement in three dimensions.

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The new microSD card is going to be fully compatible with and have the same exact dimensions as TransFlash (both measure 11mm x 15mm x 1mm in size), and SanDisk has already announced plans to "transition" its TransFlash line to the microSD standard later this year.

ENGADGET: Get ready for microSD. P.S. - It won't be so bad.

The constants that physicists measure in their laboratories are only four-dimensional shadows of more fundamental entities that exist in 11 dimensions.

ECONOMIST: Fundamental physics

Contrast those dimensions with the Ion and you have two handsets, separated by a generational leap, that measure and weigh nearly the same all around -- though the TL is a hair lighter at 139 grams (4.8 ounces).

ENGADGET: Sony Xperia TL review: the company's second US flagship is much improved, but still imperfect