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10 things massive enough to be seen from space

By: Josh Lew on Jan. 17, 2014, 10:44 a.m.
Amazon River seen from space

Photo: NASA

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Amazon River and tributaries

The Amazon River has made its way onto our list thanks to its length and the way it stands out next to the dense forests that surround it. When the Rio Negro and Rio Solimoes, both major tributaries of the Amazon, flow into the mighty river near the jungle city of Manaus, they create a web of waterways that can be seen by satellites. This phenomenon is especially evident during floods. The Amazon Rainforest also appears on satellite images as a large dark area in the middle of South America, but the rivers that flow through the forest are more distinctive visually.