历史长河中，十大灾难如影随形，警示人类珍惜生命与自然。一路向西在线观看完整国语版光头

　　National Geographic assesses the contenders for the worst natural disasters of all time those events that had severe impact on human populations. As well as examining the deadliest, we will also explore the most powerful, the most wide reaching and epoch changing events. We explain how they occurred, why they created such mayhem and explain what makes them qualify as one of our... (展开全部)