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( Physicists Build Radio 10,000 Thinner than a Human Hair

UC Berkley physicists have designed a radio out of a single carbon nanotube. The radio is roughly 10,000 times smaller than a human hair. The radio can also receive both FM and AM broadcasts.

Professor Alex Zettl said the first song they played through the radio was "Layla" by Derek & the Dominos. Zettl said the radio was the first one ever built within nanotechnology size ranges (no bigger than 100 billionths of a meter).

Practical applications for such a device include cell phones, climate-monitoring systems and human bloodstream diagnostic probes. Zettl said, "Maybe the kids will be wearing these instead of iPods, inside their ears". )