| November 8, 2003 |
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NOVA: Magnetic Storm
Something  potentially earth shattering is brewing deep within the planet's molten core. As much as we hate to admit it, some acts of nature are firmly beyond our control. Case in point is the possible magnetic storm headed our way. PBS offers this timely look at our mysterious magnetic field and how this necessary component to life on Earth could reverse, or even disappear and wreak untold havoc. Our dynamic magnetic field allows many things to happen; auroras to glow, birds to migrate, compasses to work, ATMs and checkout scanners to function, just to name a few. In our geologic history, the magnetic field has harmlessly reversed directions many times. However, scientists have found evidence of dramatic weakening, signaling a potential end to the magnetosphere. If that happens, our sole protection against lethal cosmic rays and solar winds would be gone. Our fragile ecosystem would flounder, and humanity would literally be left high and dry. Doomsday nonsense or the beginning of the end? Only nature knows the real answer. (in Science) |
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