尽管时间的长河冲刷了地球上曾经存在过的许多文明之物,但也留下了不少痕迹。人们在古老的煤层和岩层中,发现了种种年代极其久远的文物,从它们身上窥见了古文明的灿烂光芒。当然这里面仍然隐藏着许多的奥秘。 1880年美国科罗拉多州的一位农民从煤里砸出一枚铁铸嵌环。据查,此煤是从距地面45米深处挖出的。这个煤矿区的成煤年代大约距今7000万年,难道那个 Despite the passage of time that has washed away many of the civilizations that existed on Earth, it left many traces. In the ancient coal and rock formations, people found ancient relics of all ages and glimpsed the brilliant light of ancient civilizations from them. Of course, there are still many mysteries hidden inside. In 1880, a peasant from Colorado in the United States smashed a cast iron ring from the coal. According to the investigation, the coal was excavated from a depth of 45 meters from the ground. The age of coal mining in this coal mining area is about 70 million years ago, is not it