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Have you ever worried about a rocket hitting you on the 
? This is not 
 on the list of life's 
. The chance of some space junk hitting us is almost 
. However, that is changing. Scientists say that in the 
 ten years, there is a growing 
 that a rocket part could fall from 
 and kill someone. More countries are sending more rockets into space, so space is becoming 
. The scientists want nations and rocket companies to be more 
. They want them to control how rocket parts re-enter our 
.