Spies can eavesdrop on a conversation from hundreds of feet away, just by watching a light bulb’s vibrations through a telescope.
The post Spies can eavesdrop on a conversation… appeared first on Crazy Facts.
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Spies can eavesdrop on a conversation from hundreds of feet away, just by watching a light bulb’s vibrations through a telescope.
The post Spies can eavesdrop on a conversation… appeared first on Crazy Facts.