Magnetic sensors can measure distances between vehicles

(PhysOrg.com) -- Every vehicle has a magnetic field, and researchers have now found that a vehicle’s magnetic field has an inverse relationship with distance at small distances. The relationship provides a way to estimate ...

Birds 'See' Earth's Magnetic Field

When birds migrate over long distances -- sometimes thousands of miles -- they usually end up in exactly the same place year after year. Such accurate feats of navigation, accomplished by millions of birds every year, have ...

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