The amount of oxygen available at the highest place on Earth is just under 7 percent. Explorers risk their lives and test their lungs traveling to these great heights atop mountains. Who are these adventurers and why do they do it?
Peter Mavrikis has written and edited books for over twenty-five years. He enjoys writing about science, history, and nature. Although his hobbies are not as adventurous as the subjects of his books, he still enjoys camping, hiking, and lazy summer days on the beach. Peter lives on Long Island, New York with his wife Michele and daughter Amelia.
