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

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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 was we are also a nation of immigrants.

A lot of us started here, and then left. For example, millions of years ago, the only camels on our planet, as Professor guild Ronbinson, the only one on earth lived in north America. But for 30 million years, camels roamed between the Alaska and Florida and nowhere else until around 11 million years ago.During ice age, sea levels went down, and camels could then cross the inland bridge that took some of them to Asia, and many over to Africa and where they died off in America.

The survived today is 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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