The iStethoscope is apparently already replacing the real thing in hospitals. (I downloaded it for $0.99, but you're supposed to watch a tutorial to make it work. I didn't watch, I got it to work, and now I don't know what the tracings mean. Geez, why not just go to med school already?)

Meanwhile, the MIT Media Lab has invented a device to turn your smart phone into a portable optometry office.

And epidemiologists might soon use the calling patterns from GPS-enabled smart phones to help reveal emerging infectious disease outbreaks.

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