Rocky Mountain Trench from Goddard-Cropped.jpg
Ecuador  (C) NASA
River System.jpg
(C) Paul VanDerWerf
Rail Track Crossroads Many BW.jpg
Rail Track Yard Large.jpg
(C) Arnaud Abadie
Tree Root BW Med.jpg
(C) Suneel Madhekar
Lightning Single Strike.jpg
lightning2.jpg
Multi-strike Lightning.jpg
Western US.jpg
Cleveland at Night.jpg
US at Night BW.jpg
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