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June 28th, 2004
A Pill With Brains
Back in 1998, aboard the space shuttle Discovery , John Glenn swallowed a pill containing a temperature sensor and a radio transmitter to relay his vital signs to mission control. The problem: That pill was nearly an inch long -- and, at $75,000, a bit too pricey to be flushed after use. Now comes nanotechnology that promises an upgrade.
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