Earth is surrounded by a magnetic field generated by electric currents from within the planet. Compasses take advantage of this field to identify north and serve as a navigational aid. But one social ...
Most people assume a compass will behave perfectly, no matter where you take it, but the magnetic pole is a bit of a troublemaker. The rules you rely on everywhere else on the planet start to wobble ...
Do you know how birds know where to fly, stop, and stay? Discover the secret of how they migrate so successfully by seeing ...
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