By Jennifer Frazer
The deepest, darkest, scariest place on the maps I loved pondering as a child was a crescent-shaped canyon in the western Pacific ...
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This question originally appeared on Quora.
Answer by Aaron Memon, Student, Amateur Photographer
So let's start by identifying the four main types...
By: Andrea Mustain
Published: 03/08/2012 10:31 AM EST on OurAmazingPlanet
Filmmaker and explorer James Cameron has unveiled plans to visit the d...
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