U.S. scientists worry we aren't ready for a solar space storm that could knock out our electricity, our cell phones, even our water supply.The chances of that happening are small, but it is a possibility as we move into an active period of solar storms.
How do they know? Well, it's happened before. Back in 1859, a solar eruption resulted in telegraph wires burning up.Of course, the world is now covered in wires and wireless devices that could be vulnerable.
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