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These "mammatus clouds" were photographed above Hastings, Nebraska, after a destructive thunderstorm in May 2005. Although their formation is not completely understood, these rare clouds usually develop at the base of a thunderstorm, and appear lumpy because of instabilities and temperature differences between sinking and rising air. Credit: Nebraska Dept. of Natural Resources


 
			
			
 
					
						 
					
						 
			 AW: gewaltiger Klimaschwindel aufgeflogen !!
 AW: gewaltiger Klimaschwindel aufgeflogen !!
				 
					
					
					
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