An obligate parasite, or holoparasite, is a parasitic organism that cannot complete its life-cycle without exploiting a suitable host.
Part of the Andes mountain range, Aconcagua is the second highest of the Seven Summits, behind only Mount Everest in Asia. At 22,837 feet (6,961 meters), not only is it the highest mountain in South America, it is the tallest peak in all of the Americas as well as the Southern and Western Hemispheres.
Mt. Everest (29,035 feet) Mt. Everest is the highest mountain in the world. It is located in the magnificent Himalaya mountain range. Mt. Everest borders two countries. Its South flank is located in Nepal and its North flank is located in Tibet. I summited Mt. Everest from the South side on May 23, 2009 becoming the oldest American to reach the summit and return alive. I attempted to summit Mt. Everest from the North side in 2010, 2011 and 2012.