Roughly 14,000 years ago Paleolithic hunters and gatherers first migrated across a land bridge that formed during the last ice age, when sea level was low, and connected Siberia and the Americas.

• 大约1万4000年前，旧石器时代的猎人与采集者，首度越过连结西伯利亚与美洲的陆桥，那时正好是最后一个冰期，海平面很低。