大约在距今4万￣2万年间,第四纪冰川的作用使得美洲与亚洲之间的白令海峡海平面下降,比现在低约100米,海面冰冻而连接在一起,成为海上陆桥。人们推测,当时以狩猎为生的亚洲猎人在追逐猎物的足迹时,无意间跨上了另一片大陆,并在此后的时间逐渐遍布南、北美洲。约3200年前,人们开始在墨西哥东南部的丛林中定居,创造了灿烂的玛雅文明。后来,不知何因,他们放弃了都市,灿烂的文明湮灭在丛林中。 About 40,000 to 20,000 years ago, the role of the Quaternary glaciers caused the sea level of the Bering Strait between the Americas and Asia to fall, which is about 100 meters lower than it is now. The sea surface is frozen and connected together to become a sea land bridge. It has been speculated that the Asian hunters who used to hunt while hunting chased their prey’s footprints and inadvertently stepped on another continent, and gradually spread throughout South and North America. About 3,200 years ago, people began to settle in the jungles of southeastern Mexico, creating a splendid Mayan civilization. Later, somehow, they abandoned the city and splendid civilizations were destroyed in the jungle.