Terra Planet Earth on MSN
The day Earth almost lost its magnetic field: What kept the shield alive
Earth’s magnetic field nearly collapsed long ago. What saved it explains why life survived and why the planet remains ...
All celestial bodies—planets, suns, even entire galaxies—produce magnetic fields, affecting such cosmic processes as the ...
The origins of magnetic steel can be traced back to the 18 th century when scientists began experimenting with iron alloys. In 1820, Hans Christian Oersted's accidental discovery of electromagnetism ...
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