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History of Radio Pictures

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You can’t see radio waves, but you can check out relevant telegraphs, vacuum tubes and early radio models in this gallery.

When Was the Radio Invented?

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Many people consider Guglielmo Marconi the inventor of the radio. After all, he did get the Nobel Prize for it. But others credit Nikola Tesla because the Supreme Court upheld his patent for the invention of radio. So who should get the recognition?

Why do you hear some radio stations better at night than in the day?

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Have you ever noticed a difference in the quality of radio signals depending on the time of day? See how radio signals and the Earth interact.

Why do all FM radio stations end in an odd number?

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Do you know all FM stations end in odd numbers? Learn about the history and technology behind FM stations and FM station radio frequency.

How does an EPIRB distress radio work?

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EPIRB helps rescuers locate you in an emergency situation, and these radios have saved many lives since their creation. Find out how EPIRB radios work.

How does the FCC police obscenity?

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The FCC is in charge of regulating all radio and television broadcasts. Find out what the FCC does and how the FCC attempts to stop obscenity.

How does SETI home work?

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How does this SETI@home thing work? I keep hearing about it on the radio but no one really explains what's going on. What do extraterrestrials have to do with screen savers?

Essential Gadget Pictures

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Take a look at these essential gadget pictures to see the top everyday gadgets. Do your gadgets make the list? See gadget pictures to find out.

How Does GPS Work?

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For less than $100, you can get a pocket-sized gadget that will tell you exactly where you are on Earth at any moment. As long as you have a GPS receiver and a clear view of the sky, you'll never be lost again. Learn more!

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