Isaac
[魚類] 中級會員
 
UID 3203
精華
1
積分 390
帖子 326
閱讀權限 50
註冊 2008-2-11
來自 香港
狀態 離線
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[廣告]:
Ice Ages
Great ice sheets scraped across the northern half of our continent. They spread from the Hudson’s Bay area and eastward from the Rocky Mountains.
During this period, giant woolly mammoths, mastodons, bison, and sabre-toothed tigers inhabited North America.
Learn about the land bridge that allowed our own species, homo sapiens, to emigrate from Asia to North America!
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