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[All-In-1-Min] 【整理】2009-07-18&07-19 ABC Video News

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本帖最后由 incambrian77 于 2009-7-19 16:46 编辑

Yes, we are a nation of immigrants. From all over the world we came here, and many of us stayed. But what you may not know is we are also a nation of emigrants.

A lot of us started here, and then left. For example, millions of years ago, the only camels on our planet,
says Professor Guy Robinson /, the only ones on earth lived in North America. But for 30 million years, camels roamed between / Alaska and Florida and nowhere else until around 11 million years ago. During an ice age, sea levels went down, and camels could then cross inland bridge that took some of them to Asia, and then over to Africa, and while they died off in America, they survived today as one-humped Arabian camels with child, two-humped Mongolian camels. Meanwhile another land bridge opened south, so animals could migrate to South America, which today we call them llamas.

So, everywhere you see a camel or llama today, you should know their great, great, great, great, great, grandparents were originally American.

 

 

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