In a typical year, about 600 people climb Argentina’s Mt. Aconcagua, the highest mountain in the Americas. Of those, an average of two to three die trying to reach the summit. This climbing season (it’s summer in Argentina, remember) has been particularly perilous, as the mountain claimed its fifth victim, an American who was injured by falling rocks. He later died while en route to medical care. The others include an Italiam woman and her Argentine guide (killed during a fierce blizzard), an Englishman (heart attack mere steps from the summit) and a German climber who fell into a crevasse. It may still get worse: rangers are still searching for a French climber who has been missing for two weeks.