Most people associate twisters with tornadoes, but in fact tropical twisters come from hurricanes. Hurricanes are what scientists call "strong Tropical Cyclones".
This causes thunderstorms and strong surface winds. Cyclones develop over tropical or sub-tropical waters (for example, in the Atlantic off
One of NASA's most important missions is to develop an understanding of the total Earth system and study the effects of natural and human- induced changes
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