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　　# The Amazon: From A To Z
　　#### Published: 18 June 2007
　　Brazilian scientists claim a new survey proves their great river is the world's longest - beating the Nile. Michael McCarthy embarks on an alphabetical tour from source to sea.
　　A is for Anaconda
　　The world's biggest snake, fatter and heavier than the python, is one of the Amazon's emblematic wildlife species. Dwelling in the river, the green anaconda can be 30ft long and weigh more than 500lb; there are accounts of gigantic specimens far bigger than this, but they are not generally believed. It crushes its prey like a boa constrictor.
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