The Light
				Riddle:  There was a couple who lived in a house, they turned on a light every night and turned it off in the morning. One night they forgot to turn on the light and 250,000 people died.  Why?
			
			
								 	Answer: It was a lighthouse!
								Source: https://www.riddles.com/3651
			
			
					
					
										
					
										
										
					
										
																				
							
							  
							
															
							