At last, Firemen put out a big forest fire in California. From then, they tried to find (the reason) OUT THE CAUSE OF FIRE. A forest fire IS often caused by broken glass or the cigarette ends thrown away by someone casually. Yesterday, a fireman examined the ground carefully, but HE couldn’t find any broken glasses. And HE WAS sure that it was not caused by cigarettes. This morning, a fireman found out the CAUSE of THE fire. He found a dead snake which wound AROUND A high voltage wire WHICH HAS 16000 volt RUNNING THROUGH IT. AS A RESULT he discovered the CAUSE of the fire. The explanation was very simple but unusual. A bird snatched up the snake from the ground and dropped it on the wire. So the snake wound itself around the wire. When it did like that, sparks were sent down to the ground. And the sparks caused a big fire.