However, when the last ice age passed, the sea flooded the land bridge across the Bering Strait, and from then on the old and new worlds were separate. Was there still any communication between these two regions?
然而當冰河期一過，白令海峽的陸橋被海水淹沒，新舊大陸從此分家後，這兩個地區之間還有沒有聯繫呢？