July 5, 2012
When the Russians launched their Sputnik satellite in 1957, most Americans were stunned, if not frightened, by the news. Cold War aside, American hunters and anglers should have rejoiced.
That’s because shortly after Sputnik was launched, U.S. scientists learned they could track the satellite’s orbit by listening to changes in its radio frequency, relying on the same principle that explains why the pitch of a train seems to change as it rumbles past while you wait impatiently at a crossing.
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