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- StumbleUpon. Liquid Particles - canvas experiment - StumbleUpon. 25 Stunning HDR Wallpapers. Credits (not in order): Trey Ratcliff, Others remain Unknown. If you are the owner or know the owner of any of theses HDR wallpapers, Please let us know. You are free to download these photos and enjoy them but you may not use them commercially.

The copyright belongs to the respective photographers. 25 Breath Taking HD Nature Wallpapers. By Humza / November 3, 2011 Here are some 25 really amazing nature, scenic wallpapers for your desktop.

25 Breath Taking HD Nature Wallpapers

The amazing crisp, high definition resolution ensures that your desktop not only looks good but even ‘feels’ good! The artists (photographer) of these wallpapers is unknown. The Mind-Blowing Mount Roraima - All That Is Interesting - StumbleUpon. Mount Roraima is the highest of the Pakaraima mountain chain in South America and one of the world’s most extraordinary natural geological formations.

The Mind-Blowing Mount Roraima - All That Is Interesting - StumbleUpon

The 31 square kilometer summit area of Mount Roraima is defined by 400 meter tall cliffs on all sides and includes the borders of Brazil, Venezuela, and Guyana. The tabletop mountains of the Pakaraima’s are considered some of the oldest geological formations on Earth, dating back to over two billion years ago.