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			 / 25 September 2011
			
		
		A six-tonne Nasa science satellite crashed to Earth on Saturday, leaving a mystery about where a tonne of space debris may have landed.
		
	 
	
		
			
				
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			 / 24 September 2011
			
		
		A six-tonne Nasa science satellite plunged through the atmosphere early on Saturday, breaking up and possibly scattering debris in Canada.