Vast sand dunes, some of them the size of small mountains, line long stretches of Brazil's northeast coast. Their color, shape, and composition, and their relationship with wind, provide a striking variety of landscapes, each with its own ecological character.
|4/20/2015||6 a.m.||UA Channel|
|5/6/2015||1:30 p.m.||PBS HD|
|5/6/2015||11 p.m.||Ready TV|
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