Season 1 Episodes9
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Ezra Knight
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Ranked #9 of 9 in Season 1•−0.8 vs season avg
A metallic core at the center of the Earth turns the planet into a magnet, generating a field that protects life on the surface from cosmic radiation.

Ezra Knight
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"Magnetic Shield" is episode 5 of Secrets of the Earth season 1. It scored 6.5/10 from 15 votes, ranking #9 of 9 episodes this season (season average 7.3). It aired on June 27, 2013.