希腊人说,人类世纪分为黄金、白银、青铜和黑铁时代。每个时代结束,人类因堕落腐朽受到神的惩罚,毁灭,又重生。三体人说,三颗太阳毫无规律地运动,“恒纪元”与“乱纪元”交错,文明在数百次的劫难中延续。地质学家说,自显生宙以来,生命至少经过五次大灭绝。在我们人类崛起之前,是否还存在着其他史前文明?5亿年前的脚印, The Greeks said that the human century is divided into gold, silver, bronze and black iron age. At the end of each era, mankind is punished, degenerated and rebirth by the degenerate and decadent. The three people said that the three suns move erratically, the “Era” and “the era of chaos” stagger, and the civilizations continue in hundreds of catastrophes. Geologists say that since the Epoch, life has undergone at least five extinctions. Before the rise of our humanity, is there any other prehistoric civilization? Footprints 500 million years ago,