mercredi 18 novembre 2009



"Thanks to satellites, researchers found that more than 1, 2 billion flashes occur worldwide each year. (Rwanda has the most lightning strikes per square kilometer, whereas they are rare in polar regions). Laboratory tests and field showed that the heart of some lightning was 29 700 ° C, a temperature sufficient to melt the sand and instantly break the molecules of oxygen and nitrogen atoms in two individuals."

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