World's Hardest Tree To Climb

I remember reading an article on Environmental Graffiti, a few months ago, about the thorniest trees on Earth. The photos were really impressive, considering I had no idea such trees even existed, but I felt there wasn't really enough information about these amazing species of trees. Well, I took it upon myself to search around and came up with seven bad-ass trees you couldn't even hope to climb without some serious protective gear.

http://www.environmentalgraffiti.com/plants/news-trees-pain

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