Earth's Invisible 'Star Trek' Force Field Protects You From Killer Electrons

December 1, 2014 7:25 AM

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These electrons, part of the two Van Allen radiation belts that surround the planet, can knock satellites out of commission and threaten astronauts. But in a new study in the journal Nature, scientists say they've discovered that these electrons suddenly stop at about 7,200 miles above the surface of the Earth.

While it had been speculated that Earth's magnetic fields or even radio signals from human transmitters were blocking the electrons, Baker and his team say neither possibility explains the sudden wall the electrons appear to be hitting.

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