The planet is crawling with tiny spies: Hidden undersea microphones, instrument-clad satellites and infrared cameras are listening, watching and smelling all the action on planet Earth, from a migrating whale to a meteor crash.
The planet is crawling with tiny spies: Hidden undersea microphones, instrument-clad satellites and infrared cameras are listening, watching and smelling all the action on planet Earth, from a migrating whale to a meteor crash.
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