The Presidential Daily Brief

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  1. shutterstock 467103677 earth barrier

    NASA Finds Human-Made Barrier Surrounding Earth

    Shields up! Decades of very low frequency (VLF) radio signals, used by radio telescopes and submarines, have had an unexpected consequence: They’ve drifted out into the atmosphere, creating a barrier around Earth that can actually be seen from space. NASA thinks this “VLF bubble” acts as a protective force field against space weather like coronal mass ejections. These giant gas bubbles with magnetic fields erupt from the sun after solar flares, and can cause geomagnetic storms on Earth, knocking out power grids and destroying satellites in high orbit.

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