1,434/ 187/ Thơ Balon

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Tài liệu tham khảo:

YouTube- Ants create a lifeboat in the Amazon jungle - BBC wildlife
http://www.youtube.com/watch?v=A042J...eature=related

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http://www.youtube.com/watch?v=qOe5Lmyyxiw&NR=1

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http://www.youtube.com/watch?v=DXaaTQztoI0

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http://www.youtube.com/watch?v=GxvSTA7ParU&NR=1

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http://www.youtube.com/watch?v=PljzqcsQ62U&NR=1

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http://www.youtube.com/watch?v=k1Npv...eature=related

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http://www.youtube.com/watch?v=ODy3CiS7H4o

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http://www.youtube.com/watch?v=MHjXfPWJZKQ